Me and my boyfriend had sex today, we were in the moment and he ended up just going inside of me… after we got done having sex I went to the bathroom, and I had started my period. How much of a possibility is it that I could still get pregnant since technically I don't really know if I was on my period when we had sex?… right before we had sex I went to the restroom and I hadn't started yet, but after sex when I wiped there was a little blood.