This morning I had sex with a guy, and for like one second he was in the wrong hole. He then pulled out and put it in the correct one, but now I'm worried I could get an infection or something. I've read it's not good to go from back to front without washing first, so I'm just a little worried. It was only for a second though, and he didn't go all the way in, so do I even need to be worried? If it is likely I could have an infection or something, what should I do?