2 weeks ago I had sex with a chinese prostitute, I was in my room masterbating when she knocked, thinking it was my friend I opened the door and sex happened. There was no foreplay, kissing or oral sex. I wore a condom and the sex lasted maybe 10 seconds. The penetration wasn't deep and if there was any skin to skin contact it was very minimal. I recently found a lump in my rectum. On webmd the RN said it is "seriously doubtfull" that i contracted herpes, let alone have any rectum issues. I am paranoid more than I ever felt possible, I have a girlfriend I adore and just am killing myself with this.