Constant Inflammation and pain in penis.

Hi, I have been diagnosed with semen infection and is on medication from 7-8 months . Earlier I was in levoflox 400 medicine and infection is gone now as semen  culture is negative., Urine culture is also negative I m currently in medicine bacstol 200 and amtiq10 for about 2 months but constant penile inflammation and pain is there . Doctor is saying men's infection took time but it's already 8 months , how much do I need to wait now? Doctor also taking cystoscopy as consideration but I m afraid that cystoscopy may damage or causes scars in penis and bladder, is it safe to go for cystoscopy? I am currently losing my patience after 8 months of pain and burning. Do I need to get admit in hospital for IV , will it resolve my problem quickly? Kindly answer above questions!! Thanks