I'm At a Loss

Hi. I'm hoping someone can help me out a little bit. For the past three or four years, I have been having chronic uti's. They cause me pain on either side. I have seen numerous urologists and have had different diagnosis from each. I was told by one it was simple cystitis w/ infection, the next told me I had kidney stones, performed ivps, ultrasound, vc something (involving a catheter and pictures of my bladder) and a cystoscopy. Following the ultrasound, the technician asked if I have ever had trauma to my left side (i have) but he would say anything else. After the cystoscopy, the urologist told me I had a narrowing of the urethra (which he stretched) and chronic inflammation of the bladder. He said everything should work well now, and would not say anything about the trauma. Now I have yet again been having the kidney pain. I partly wonder if the trauma to my left side may have some part of it. If anyone has any ideas, I would very much appreciate it.

P.S. If family history helps, my grandfather died of a ruptured kidney, kidney stones run on both sides of my family and my sister has interstitial cystitis