Hi, my boyfriend and I were having sex and afterwards, I realized I was bleeding a little. This is not the first time we've had sex and my period ended a week before this event. This has been the first time we've had sex in two weeks. It was a light blood red and it has begun to stop after an hour or two. I dont know what this means, if he was too rough or if this is implantation bleeding. Ive never had this happen before.