Some of the tips to manage symptoms of epidimytis include rest, ice packs to the area, and supporting your scrotum with an athletic supporter, but use that last one only as feels comfortable.
At the urologist, I'm sure you'll get the basics - an exam, urine test (in office, and maybe they'll send it off for culture), and maybe an ultrasound of the area. That may be at a follow up appt, along with a cystoscopy, perhaps.
I hope you feel better. It sounds painful.