Discharge for 5 months!

[Mohoss]

I had un protected encounter on jun. after two weeks i started to feel pain in penis and urine burning with yellow small amount of discharge , i visited the doctor who gave me one dose medicine ( zithromax and other 2 medicines) and had urine cukture test, after the result he asked me to get vibramycin for one week, then no progress he asked me to retest urine culture and the result was new bacteria then he gave me gentamicin and the discharge disappeared for 2 weeks then started again, i visited anither doctor who gave me tabocine , flagyl and an injection I don't recall the name , no progress howver tested for urine culture was negative but gonnoccal antibodies test was positive, then i had another urine culture test came negative also, I decided to go to third doctor and he tested me again and it came positive this time with new becteria which is number 3 !! But he asked me to take cordura as he thinks it is something related to prostate and ofloxacine .. and gave me 500mg injection for once cephasolin , unfortunately i still have small amounts of yellow greeny discharge, pain while urine and when ejaculating like burning.. and urine is coming out in two streams .. i feel slight pain in both abdominal sides from time to time !!
Is it being uncurable? And why I'm having new type of becteria every time i get tested? And if it still shows in the test that th becteria is senstive for certain antibiotics this means that there is still hope !
I got a lot of antibiotics during the last 5 months and I'm really worried
Thank you in advance!