Healed kidney infection but not UTI?

Hey everyone. Okay let me summarize. A little over a month ago, i was feeling classic UTI symptoms, pain/throbbing in urethra, urgency to pee, foul smelling pee, etc. I got a test done at Quest and it came back the next day that my pee was completely normal. Super weird, but I went about my business, being sure to take my d-mannose supplement every night before bed.

A few weeks later, I begin to feel super weak and like walking 2 feet was a chore. Tons of lower back pain. I then got a fever that spiked to 103 and I just felt like death. My boyfriend brings me to urgent care and the doctor took a urine sample and said it was all sorts of lit up, clear sign of a UTI/pyelonephritis (kidney infection). She gives me an injection of rocephin and then prescribes bactrim for 7 days, twice a day. I start feeling a lot better by day 3.

Fast forward to now, I just finished the bactrim a few days ago and the UTI symptoms have not cleared. I still have urgency, pain, and my pee smells funny. So I made an appt with my doctor and and she took my urine, she told me the dipstick shows my pee is perfectly fine. She's still going to send it off for culture and test for ureaplasma. What gives?!?! Any insight/advice?