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delay in second period after taking plan b one step?

By March 26, 2011 - 8:19pm
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I started my period on the 28th of January and took a plan b one step the 13th of February because of an incident. It made my period come earlier than expected (February 21), this was around 2 days earlier. It also made my period last long as well (about 8-9 days).My periods usually last from about 4-5 days.

Its now March 26 and i still have not started my period. I had protected sex on March 2,8,16,17 and 19 ( i know this because i saved it on my "my days" period calendar app on my phone). It says I was supposed to start on the 19th of march, but i have not started yet. Is the plan b one step the cause of my delay in my next period even though I already started my early period a couple of days after I took it? . please help I am so worried.

OH on top of that, i went to the doctor march 24 just to check if i was pregnant, although the nurse didnt really seem like she knew what she was doing.. i asked her why my period would be late and she gave me other reasons that really didn't pertain to me. I took the urine test and the pregnancy test came out negative. She did diagnose me with UTI but gave me yeast infection medication.. pleaseee help i dont understand why i havent started my period yet and i was also wondering if it was too early to check even though i went to the doctor and took a urine test. PLEASE HELP

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EmpowHER Guest

Hello all,
I took plan b pill on feb 27 and had never before been on any type of contraceptive, March period came early, April period came a week late and now it's May and I am 1 week late. Could the bill still be messing with my cycle (given that my body had never been exposed to any sort of contraceptive pills or any other method). Please help I'm going crazy ...I am experiencing all of the PMS symptoms but no bleeding (could it be just me stressing out that's causing the delay)

May 22, 2016 - 7:24pm
HERWriter Guide (reply to Anonymous)

Hi Anon

You should not be experiencing any side effects from Plan B at this stage. You may be irregular due to having a hormonal imbalance; this is often the reason for irregularity. If you don't get back to being regular in the next month, talk to your doctor about your options - the birth control pill can help but you will need to weigh up the pros and cons.


May 24, 2016 - 1:38pm
EmpowHER Guest

Just to add my experience with Plan B, it definitely made my second cycle late by 5 days. My first cycle after taking Plan B came 2 days early, and I had no idea it would affect my second cycle like it did especially since my period always comes right on time. I took several prgnancy tests I was so worried. If you're scared just take a pregnancy test and if it comes out negative then just calm down and wait for your body to get back into its cycle, it has gone through a big shock of hormones and can take a few cycles to adjust. Also for 3 days before my period finally came I took 1500mg of vitamin C daily because it supposedly helps bring on menstruation. Parsley tea from fresh leaves supposedly helps bring on your period though I haven't tried it. Be patient and gentle with yourself and best of luck :-)

October 16, 2014 - 11:17pm
EmpowHER Guest

so did your period come???? when??????? im in the same situation im late by 6 days i want to know when it will come.

March 14, 2013 - 2:09pm
EmpowHER Guest

Hi nesssaaa,
Thank you for your question and welcome to EmpowHer. It is very common to have irregular periods after using Plan B for a few cycles. The Plan B website even provides that information http://www.planbonestep.com/plan-b-faq.aspx.

Since you just took a pregnancy test and it came back negative, I would wait another 2 weeks before trying another one. Stress, fear of pregnancy, eating habits and exercise regimes can all change your period also. All of this is common. Keep us posted in another 2 weeks and see if your period comes on its own or take another pregnancy test. If you have concerns beforehand, contact your physician.

Good luck.

March 27, 2011 - 10:47am
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