I recently had unprotected sex with various females, as a matter of fact this took place about two weeks ago. Now, I've been feeling pain and a small ball in the interior lining of my anus. It feels very awkward and uncomfortable when squatting and even while walking. Also I noticed several bumps in the outside lining, which I bleed from after I clean my self after defecating. I was hoping you can tell me if these are symptoms of any STD and which one?