I'm 21 yrs. Old and have always had regular periods. I've taken birth control for several years and haven't had any issues. This time around I'm taking ocella and have been on it for right around a year. About a month and a half ago missed the 2nd pill in the pack and another one about 2 weeks in. This caused my period to be 5 days late. Doctor told me to take my next round of pills as normal even if I was still on. About a week into my new pack I started my period again but this time I was on for over 2 weeks. I went to the doctor and had a blood pregnancy test which came back negative and had an ultrasound done to look for cysts. Also negative. I got off my period for 5 days and then started again for 7 days. Was off for 4 days and have now been on for 6 days and still going. My pills end in 5 days and then I'm supposed to start my actual period. Please help I need to know what could be going on with me.