Uti symptoms but no infection

Patient: I had a few utis months ago. Last one was in September. I started having vaginal burning a few weeks ago andfigured it was a UTI. The burning came back and my obgyn said it was cleared up and was not the cause. I started getting back pain and had blood in my urine and went to the er. I had one white blood cell in my urine and a little bacteria. They gave me cipro and I felt better but the culture showed no growth. I started getting cramping and burning again and went back to mu obgyn. Still no infection but ultra sound showed a ruptured ovarian cyst. Urine was clean yesterday but today im experiencing burning. The burning seems to come and go. It’s not an std. What could it be?