So i started my period on a Sunday and that same day i started taking birth control pills. Thursday is when i got off my period and compeletly stopped bleeding. Friday night i had sex and it was unprotected, but he did not come inside me, so i couldnt be pregnant! But when i went to the bathroom afterwards and i wipped i noticed some blood, but didnt think anything of it because that has happened to me before and i stopped bleeding 1-2days later. I figured it was just because i had sex too soon after my period was over and the bleeding was due to the penetration. But this time ive been spottin blood for about five days and i even have a bit of cramping also. Could this be the affects of me starting BC or an STD??? Answers Please!!!