today, 6/6/2009, i realized i have a small red abrasion a bit on the left side of the shaft and on the left side of the tip of my penis. i think it might be from masturbating too hard last night but what worries me is that last saturday 5/30/2009 i had made out with and received a blow job from a friend whose sexual history i am not so sure of. i am worried i contracted herpes from this girl even though she told me twice that she was clean. the abrasion doesn't itch, it doesn't hurt to urinate, but since about tuesday i've had a sore throat. i am kind of worried and was hoping if there is anyone who can help me with this?