Hi, i am concerned about a recent encounter with a man who claimed he was not infected, we engaged in oral sex both receiving and giving, no ejaculation at this point, then we proceeded to mutually masturbate, at this point there was ejaculation, first me then him, and his some of his cum got on my penis at the urethra, should i be worried about infection and should i consider getting pep its been less then 24hours. please answer asap