Halp!

So I wanted to ask this to my doctor but I want other peoples perspective and help because, well, I don't want the doc to look at me funny. lol. So I had Anal for the first time. It went well and it was intense. We ended up having normal sex because it was too much for me. wow. So the day after I was having a shower and...I felt something there, like a little piece of skin, it's sort of a sore maybe, or something that isn't supposed to be out. I just need help and a thoight from you guys, please tell me what you think.