I haven't had my period in almost 3 and a half months, and I am not pregnant(I've taken 2 tests). I normally take birth control, but stopped taking it a month ago in hopes of my period returning to normal (which has not worked). I did take the morning after pill about 3 months ago (I was on vacation and accidentally skipped a couple days of taking my normal birth control pill) and am wondering if that's what caused it. Has anyone heard of this happening?