After having partial nephrectomys for kidney cancer, I had uti every month, for several years now... ending up in the hospital with sepsis twice . I do not have the usual early symptoms anymore so I've become more proactive. I tried cranberry and d-mannose as well with no impact. The bacteria for mine is enterccous and only receptive to certain antibiotics. I was on Bactrim for a period but concerns over damage to my already damaged kidneys led to resistance by my docs to prescribe it. I did research and found a prebiotic that some studies had shown reduces the capability of this bacteria to reproduce, so I now take a low does of keflex and this prebiotic, with an immune boosting MCT wellness drink ... I've been 90 days now with no infection. Whoot whoot!!
I also test at home regularly to ensure I catch any infection early. I always advocate for the correct antibiotic , encouraging them to review my past hundred infections , tell them I test at home etc.