Me and my girlfriend were fooling around about 4 nights ago, and she was on her period so we didnt have sex, and both of us are clean (STD wise). and we dry humped for a while and i was naked, and she had jean shorts on and while i was doing it, it was kind of painful on the head of my penis. then after that she gave me head, and i never came. from that night on whenever i masturbate, whenever i come it feels different and hurts just a little bit, whenever i pee, it also burns a little. does anyone know whats going on???