Hi, I received a blowjob with deep throating from a guy I later found to be HIV positive. He had mentioned after the blowjob that he was a bit sick with stuffy nose and I remember that I felt the tip of my penis hitting the back of his throat(which, it seems, might have been sore). I know that the opening of the penis is where the mucous membrane begins, so I am worried.. What are the chances of becoming infected?