Please help! (Sexual health)?

Okay so I lost my virginity about six months ago but it wasnt too intense or anything. We had sex multiple times. So now me and my boyfriend have been fooling around for a month now and we havent had any problems. But a week or so ago he had fingered me and he was going down on me and (Sorry if this is gross) but there was blood on his face and i got up and there was blood all over the sheets. So I figured it was my period so i changed and put on a pad. So later I checked my underwear and there was no blood. I figured maybe it was my period and it would start again later. So I paid no attention to it, But today we were messing around again and he was fingering me (unusually deep) and the same thing happened. It doesnt seem to bother him but im really worried somethings wrong. Any ideas? Thank you so much, Christie