What do you think i have?

a couple weeks ago a i started having UTI syptoms. so i went to the doctor and from the anisial look at, he said i had a UTI.
I started on an anti-biotic and things got worse before they got better.
I started with frequent fevers and to really bad buring sensation when i went pee.
By the second day of my meds i was perfectly fine, but then the doctor came back with the lab results and said that he didnt think i had a UTI. That the lab test didnt grow any bacteria?!?
the meds worked, but now im done and it seems like my symptoms are slowly coming back.
he said that in my urine i had alot of red (blood) and white blood cells and until the lab test he thought it was a UTI.
I dont know what it could be, or what to do next?
its not a yeast infection, no symptoms that match that.What do you think i have?
i recently went through the same problems, you might want to ask them a bout a kidney infection.Those are all the same symptoms i had and then they relized i had a kidney infection.It went away and came back three times before they knew.
did u get checked for stds or ne thing else cause thats what it sount like
Just keep insisting on test till you get answers, we cant guess what it is.
It could be a kidney infection. I had those symptoms once and that's what it was.