2 days ago I was with a boy and he asked me for a condom. I did have one so I gave it to him to put on but he said he was having difficulty rolling it down his penis. He took it off and went ahead anyway, I've only had sex twice before with the same boy but as i'm very small he couldnt get his penis all the way inside of me. The same thing was happening and i was in a lot of pain, i said "this isn't a good idea" as he wasn't wearing a condom and he stopped before he orgasmed, but yesterday and today i feel as if i've been cut on the opening of my vagina and im very worried if i've caught anything from him. I noticed that his penis smelt abit strange like cheese, and ive noticed small blood stains and brown discharge in my underwear. Please help!