I have a one inch slit (not a circle) about 1 inch below the top of my butt crack directly on the crack. No drainage, but red base and hurts when I pull apart my cheeks. It looks like a pressure ulcer stage 2 but I am totally mobile. I have had some diarrhea over the last two days. Freaked out b/c I had protected vaginal sex but unprotected oral sex with my ex about five weeks ago. Is it herpes? All of the pictures I have seen have been clusters of bumps but this is a single sore????What is it? What do I do? What do I put on it?? So scared....Thanks:-(