Bleeding after sex...

Hello ladies! Sooo yesterday I had sex with my boyfriend and when I went to clean up I saw a bunch of blood I started freaking out because I haven't had my period since Nov.20th and I'm irregular (I have to take provera in order to get my period)- I haven't taken it! So like the bed was bloody and he was bloody it was a total nightmare! I was super embarrassed! This has never happened to me and it's not like we did it rough or anything so I'm just wondering what the he'll happened!!! Fyi.. I don't have my period and the blood only lasted about an hr! I know it's TMI but I'm just concerned..