I really understand what you're going through in the anxiety department, Panda. I've been on a HA roller coaster the last few weeks/months too, always a new thing and I come here for reassurance to get through. In answer to your question though, this really, really sounds like a hemorrhoid to me. And they can happen pretty spontaneously so just b/c it wasn't there a few weeks ago doesn't mean you couldn't have one now. The burning is also classic hemorrhoids. Get some Witch Hazel wipes for hemorrhoids and dab the area. It's cooling and will feel better and in the meantime, stop poking and prodding (why were you doing that in the first place?) and relax.