On April 7th I started my period. I have a 28 day cycle, and I'm on my period for 5 days. On that sunday April 15th, I started birth control for the first time in a few months. On April 19th, more like the morning of April 20th, I had unprotected sex (he pulled out but i know that's not effective). I've still been taking the pill since, but on April 24th I started spotting, (more likeblack/brown clotting). It wasn't a lot at all. As the days went but it started to get a little bit heavier with more dark clots. Today it looks more like a period but not as heavy (red with bigger black/brown clots). I'm scared I might be pregnant and this is implantation bleeding or could it be my body trying to get use to taking birth control again? I have no other symptoms of pregnancy. I'm really scared. Someone please help.