I had a similar infection just before I had my AUS procedure. Epididimitous was the call.
I caught it before it got to far along otherwise, I may not have had the procedure.
It took about a week to get better and I used an ice bag to get swelling down
You may want to use ice and something (aspirin) but depends on when your RP scheduled.
You need at least 2 wks off aspirn before surgery do to clotting problems.
Not going to recommend any antibiotics since I am not certain if its a UTI, Epidi, or what - that is up to your Urologist or Physician.