Talk to Urologist on Extreme Burning While Urinating

I've been having this extreme burning sensation while urinating from past 5 months. I've visited multiple urologists.

At first, after seeing my Urine DR report, Dr. prescribed me ciproflaxin for 5 days, 2 times a day and asked me to go for urine culture test. After taking the prescribed medicine I went for urine culture test, report showed no bacterial growth but the problem was still there. After seeing my urine culture report, dr. prescribed me vibramycin for 7 days. Even after taking vibramycin, there was no betterment, so I changed the doctor.

Upon consulting another urologist with the previous medical records, I was asked to go for KUB Ultrasound and another urine DR test. I went for both and with the reports, I was then given Focin, Monurol and was told to go for 2 other ultrasounds, Pelvis and Abdomen. With the 2 other ultrasounds being cleared too, dr. prescribed me Amikacin injection, which were to be taken 5 days intravenously. Even with those injections, there was no imp