Now just like birth control doesn’t “fix” your acne, it didn’t “fix” my heavy periods either. Birth control replaced replaced my periods with a medication induced withdrawal bleed. It's designed to stop you from having a cycle so you don’t get pregnant, therefore you are not ovulating, you are not cycling hormones and you are not having a period. But “I thought I was having a period every time I went into the placebo week.” I wasn’t, you aren’t, and this can mask more serious issues for some women because you are still having a medication induced withdrawal bleed. After 14 years of being on birth control it took me over a year to have a cycle again, and almost another year for it to become somewhat regular again. My hormones were all over the place and probably had been for years, but I was still having my “period” like clockwork because that’s what birth control does.