I too am hoping that the post infection inflammation is the cause of the pain and that the infection is gone and the pain will subside soon.
No, I never experienced any other symptoms of a STD. I suspect Chlamydia, one because I had unprotected vaginal sex a few months before the epididymitis/orchitis; two, the girl I was with developed and eye infection that I suspected to be conjunctivitis (which can be caused by chlamydia). She was given antibiotics for the eye infection, later she tested negative for chlamydia, but I suspect the eye antibiotics cleared up the chlamydia.
Wow, that is allot of antibiotics! I am having similar problems for 7 weeks now. Do you have or did you have any other symptoms besides the inflammation?