Mellow out man....you're fine. If you had it wrapped up for everything, and she didn't have any oozing herpes sores all over her thighs and ass...the only things you have to worry about are crabs and scabies. They are a joke...if the itching persists, just go to the pharmacy and pick up some Kwellada (OTC)....then slather your groin area in it for a few days. You'll be just fine.....trust me. I've fucked some dirty girls, and I have friends who have fucked sluts so dirty that for a while I figured AIDS was a myth if they didn't have it. Bottom line...AIDS isn't that easy to get if you are a straight guy....nearly impossible with a condom. The fact that you rammed a completely strange chick in the ass ups the risk a tad, but with a condom you're ok. Still, man.....what the hell were you thinking banging a drunk chick you didn't even know in the ass??? Hell, she probably didn't even know if the track was clear in that state....you could've had a head-on collision with the fudge express!