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Reasons for Having a Period Every Two Weeks

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Menstrual Cycle related image Andres Rodriguez/PhotoSpin

The menstrual cycle occurs in all females from the onset to puberty (average age 11 or 12 years) to the menopause in middle age (average age between 45-55). The lining of the uterus is shed via vaginal bleeding when a girl or woman has not conceived a pregnancy.

The menstrual period lasts between two days and seven days, usually occurring once every 28 days, although anything from once every 24 days to once every 35 days is considered normal.

If you are having a period more than once every 24 days, it is considered an irregular cycle.

Having a period once every two weeks, or twice a month is abnormal and you should see your doctor because you may become anemic if you are having very frequent periods. They are sometimes a sign of infection or other medical problem that would need treatment.

Reasons for a period every two weeks could be:

• Dramatic weight loss or gain -- This changes the hormones in the body and these are responsible for directing when the period will start.

• Excessive exercise -- This too disrupts hormones.

• Stress -- Exams, family argument, financial worries, divorce, even a holiday can cause a temporary change in your menstrual cycle.

• Illness and/or medications -- Some medications can affect your cycle. Talk to your doctor about altering or stopping your medication if you think this is happening.

• Uterine problems such as polyps, cysts, fibroids or tumors (either benign or cancerous).

• Sexually transmitted infections -- These can cause bleeding in between periods which can be mistaken for a period.

• Thyroid problems -- Thyroid disease could cause a thickening of the uterine lining, resulting in more bleeding than normal.

• Reactions to contraceptive methods -- Sometimes the pill, depo provera injections or the copper-only IUD can result in a change in your cycle.

~ The pill and IUD can make you bleed in between periods, known as "breakthrough bleeding" and this may be mistaken for a period.

~ The IUD can also make your periods heavier.

~ The depo-provera injection can make your cycle irregular, however, it often stops your period altogether instead of making it more frequent.

Add a Comment175 Comments

EmpowHER Guest

I will be 53 this year and I have been dealing with Menopause for almost 2 years now. I have my period every 2 weeks, sometimes sooner, and it lasts for 3 to 4 days and I use a box of 40 Super Plus Tampons every 2 weeks. I lose blood clots the size of a pingpong ball at least once or twice within the 3/4 days. I have always had heavy periods, however not every 2 weeks.
I am not married and never have been, however I am in a committed relationship and have been for the past 7 years and this BS makes it kinda hard to enjoy my sexual desires with my very patient and understanding Man.
"Aunt Flow" always comes to visit and I have NEVER invited her - can't stand the woman - she needs to be removed from Society!! lol
Just ranting and raving - I will deal with this part of life that God has bestowed on me, just like the rest of the "woman things" he seems to think we enjoy!!
Love to you all, Just Me

August 23, 2016 - 2:49pm
EmpowHER Guest

I found out I had an ovarian cyst last month (I don't know what size or kind). I went to the ER with pain in my right side thinking it was my appendix, but there was no infection in my blood. It turned out to be a cyst on my right ovary instead. I've never had children or been on any form of birth control (even though I'm 25), so it was my first pelvic exam and ultrasound. Fun times. Since then, I've had three periods every 2 weeks with stabbing pain so bad that I've actually cried into my pillow even after taking advil, etc. The ER referred me to an OBGYN and said that I could be seen once for free since I was without insurance at the moment. However, the specialist said it would be $185 for just an office visit. I can't do that. So, I made an appointment with my clinic even though they don't have a specialist like that there, and I have no idea if there's even anything they can do to help. If they aren't able to help me and this continues, should I try going back to the ER? Do you think they would just send me home to suffer? :c I feel stranded.

August 15, 2016 - 9:50am
HERWriter Guide (reply to Anonymous)

Hi Anon

I can't say to the hospitals' policies where you live but my advice is to go to Planned Parenthood for a checkup and go from there. 

You should also apply for Medicaid if you can. Check your social service offices. 

I do hope you get this cleared up soon.



August 15, 2016 - 3:54pm
EmpowHER Guest
Anonymous (reply to Susan Cody)

Thank you so much for the reply! It means a lot to me that someone actually took the time out to respond. (I have tried to apply for Medicaid, but that's a long story.) I did end up going to the hospital tonight. Unfortunately, they can't drain the cyst or do surgery on it there from the Emergency Department, but they did at least give me medicine to help with the pain. They also made sure I wasn't losing too much blood. I have an appointment scheduled for Thursday at my clinic. Here's hoping they can help me out in some way! Send kind thoughts my way. :)

August 15, 2016 - 10:08pm
HERWriter Guide (reply to Anonymous)

Many kind thoughts to you! 

Let us know how your appointment goes! 


August 16, 2016 - 1:03pm
EmpowHER Guest

I am 19 last month I had my period on the 13, 23 and this month 2, I am so scared because this hasn't happened to me before

August 5, 2016 - 11:24pm
EmpowHER Guest
Anonymous (reply to Anonymous)

I had sex on the 22nd of August and I started my period on the 20th of August and today for some reason I had spots of blood and I just turned 18 I think that I'm pregnant but I dont know until I get a test done on the 20 of September. My mom said before her first pregnancy the same thing happened to her.

September 2, 2016 - 6:53pm
Guide (reply to Anonymous)

Hello Anonymous,

I can appreciate how frightening this must be, but there is a likely explanation. The menstrual cycle is regulated by a precise balance of hormones. Any upset will cause an irregularity.

Please reach out to your gynecologist, who can order blood tests to check your hormone levels.


August 6, 2016 - 8:27am
EmpowHER Guest

Hi, I am a 17 year old and only just recently have I experienced my first time getting my period twice in a month. I'm not too sure what to pinpoint the cause of this? I know since I'm still a teen, I'm developing, so my periods might be irregular (which they were irregular, as in always a couple days apart the next month). My first cycle lasted 14 days, before I got my period again, lasting 11 days. Bleeding only lasts 4-5 days.
I'm a bit scared. I don't know how to fix this. I'm not taking any contraceptives, nor have I ever been sexually active. I do take melatonin regularly, though.

August 4, 2016 - 12:00pm
EmpowHER Guest

Hello, i can not though find answer to my situation no where, so I hope you can at least give me some leads where to. I'm 31, and all my life so far I've been having irregular periods- never excessing 21 days between them, mostly not even having 3 full weeks without a period- after 17, 19 days again observing a period. I thought maybe after childbirth something would change, it didn't. No cysts, no cancer, no illness, no pills, or medication detected by any doctor. Blood tests good, healthy.
My body has gone through different changes ( healthy weight, a little doing sports, after birth of my children 30 kg overweight, then again back to normal weight and way too healthy lifestyle: running, exercise, healthy eating), but it always stayes the same, I mean my sequence of periods- irregular. Is this maybe my case my normal of being this way, or should I look for an answer somewhere else.

August 2, 2016 - 8:58am
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We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.

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