I’m embarrassed and I think he’s turned off (TMI)

Ok soo...I haven’t seen my Bf in a few weeks we have a long distance relationship and we haven’t had sex in a while. So tonight we decided to and midway through there was some blood on his penis. He just stopped and asked if I was on my period :-(!!! I’m not! It’s not expected until another week or so. But it totally killed the mood. I was so embarrassed this has never happened before. He seemed pretty concerned but freaked out as well. Once we stopped and I went to the bathroom I notice just a little hint of pink on the tissue. I think it’s just because we haven’t had sex in a while and he was a bit rough, but I’m afraid that it’ll happen again...what should I do?