I am 28 years old. I have been on birth control since I was 17. I have been taking Kariva (b/c of menstrual migraines) for the past 4 years. I have never been pregnant and I have a very good track record with taking my pills on time (generally within 30 minutes, if not right on the hour). I take no other medications, prescription or 'natural.'
Early this year I was distressed by the fact that I'd had no period for 3 months in a row. I took a pregnancy test two months in a row and both were negative. I thought maybe I was just too stressed out. I went to the nurse practitioner on my campus just in case and she assured me I was probably not pregnant--she did not give me a pregnancy test on the grounds that what she had were just as effective as the store-bought tests I had purchased and used. She told me that b/c I have been on the pill so long I've probably just stopped producing a uterine lining and thus have none to shed when I take the inactive pills.
The next two months in a row, I had very heavy periods--like I had not experienced in 21 or 22. This past month, I had no period, at all, again.
Can someone please help me understand why my periods have been happening/not like this? This back and forth I find frustrating, and not knowing why is just added stress. Should I seek another kind of pregnancy test? Are there other potential issues I should be aware of? Thanks for the reassurance/advice.]