No longer a virgin

Last Friday I graduated so I had plan to take my parents camper for a night with a couple of friends. Well when we got to our camping spot and there was bon fire near us so we went there and needless to say I didn’t hold back on the alcohol. Around 2 am the police showed up. About 4 the police let everyone go and made sure that they had some place to stay which was my camper. So the night went on and I ended up sleeping with this guy. The issue is that i had started my period that day. Well I had a pad on and I totally got caught up in the moment and forgot to mention that I was on my period. Well as we continued he asked if he could take the condom off and I let him but I’m not sure if he pulled out or not. So I am concerned that he didn’t. But the next morning he woke up with a bloody hand. I feel horrible because I should of told him before anything started. And apparently he has told my guy friends about it and they won’t tell me exactly what he said. So I have this feeling that it wasn’t the nicest thing, which is okay but my question is should I message him and apologize or just kind forget about the whole thing?