Okay, this is really gross, but...for the past couple of weeks, my anus has been really hurting. It feels like it's really sore, and almost like there are little cuts in there. It hurts when I go to the bathroom as well..there's nothing there that I can see, but it feels like the way it feels when you take a really painful ****. Sorry to be so graphic, but that's how it feels. Help! What is this?? I've only had sex with 1 person, so I don't think it would be an STD, but I don't know what else it could be.