I'm suppose to get my period around the 17th but my periods been off lately because of birth control. Thursday I started spotting, redish, brown. Sunday I was still spotting, and I didn't take my birth control, and I completely stopped taking it from then on. Yesterday (tuesday) i started bleeding like a normal period, but the flow was lighter..I'm still bleeding but there's tiny blood clots. Just one. I took two pregnancy tests and they came up negative.. could I still be pregnant? or is this just my period?