How is kidney reflux treated in adults (I'm 32)? It is SO painful!!?

I had a micturating cystogram on Monday, I actually couldn't pee during it (it's really difficult to pee standing up in front of strangers) but the radiologist was able to diagnosis reflux because the pee went a way up my (left) ureter. This usually hurts and gets worse and worse until I actually pee, I get a feeling of pressure in my kidney area too and it's all relieved when I pee. It's been like this for maybe 8 years or so. She asked me a lot of specific detailed questions and said it wasn't necessary for her to actually see what happens when I pee because just the bit going up the ureter was enough to make a diagnosis, I assume all the questions were to give her a better idea of the severity. What do they do to treat this? I've had a 24hr pee evaluation about 4 years ago which showed I was leaking protein and a couple of levels of something or other were too high or too low, I can't remember, and my calcium output was slightly low. I've also had a ureteroscopy which showed my left ureter was tortuous and I had a narrow renal junction, and I've been told I've got scarring in the kidney as a result of having pyelonephritis a few times and frequent kidney infections, and during surgery for severe endometriosis my left ureter was found to be caught up in a mass of adhesions but has now been freed up- I hoped this would sort the problem out but apparently not. 4 years ago my kidney function was 45% in the left, 55% in the right which I understand is normal. I get frequent UTIs too which I take antibiotics every day to prevent. I'm seeing my urologist on Tuesday, I'm just after a bit of info to stop me second-guessing everything and driving myself insane. All I can find on the internet seems to be about this is children. Does anyone have any info or experience with this? Thanks in advance.