My boyfriend and I were having sex the other night. He wanted to try anal sex. I've never had anal sex and I wasn't sure about it, but he put his penis into my anus and he only got it a little bit, but couldn't go more than halfway. After a while I told him we would need lubrication. But we didn't have any. Then he stuck his penis back into my vagina. I told him he should have washed off first. It's been four days and I have smelly discharge and it burns a lot. I suppose I have an infection or something from what he did?