I started taking birth control at 12 or 13 to regulate my period(I'm 19 now) and stopped taking it September last year. I didn't have a period until last month. This month I felt like my period was about to start but I just had spotting for 4 days and I've had cramps a lot and I still haven't started a normal period and I should have started like 15-17 days ago. I took a pregnancy test yesterday and it was negative.