Hi, not sure of your sexual activity, but perhaps getting screened for STI's, if you haven't would be good. Also sometimes with urine test, depending on the time of day, what you drank, etc your urine can provide different results based on the level of bacteria thats in it. So maybe getting on antibiotics regardless of test results is a good idea. I once had a doctor that although all test came back negative, based on my symptoms prescribed me antibiotics and all was well.
Otherwise good luck and don't return to that gyno!