late... sex.... blood

Im 16 days late. I have felt rather sickly. Weak tired starving one minute full and disgusting the next bloated tummy issues mild annoying cramps. Soo i aint had my period and so he was fingering me last night and was about to go down i stoped him and ran to the bathroom lol so we talked about it and i wasnt bleeding we both looked and i was clear. So usually i cant ride him because he is so big but i did twice. And then he got behind me and i could tell he was really in there. And we finished and he cleaned us up and when he went to the bathroom and saw blood on his hand and D.(sweet part he pulled out a towel and started the shower for me) so it wasn't a lot of blood but what could hae caused thisi have never had bleeding after or during sex.