My and a friend of my recently had sex with a party girl as a one night stand. To my knowledge my friend had slept with a lot of girls, escorts, and he did the girl first this time as well. As for me, I had a brief unprotected intercourse, about 10 seconds, with that party girl, she ride me. After that I just let she sucked me and make out. What are the risks am I exposed to? It's been almost a month now, and as far as I know, I don't have any symptoms