confused & scared

Amanda
So yesterday went to doctor as I thought I had another UTI and infection like BV as my flora has been off and not normal kind of unpleasant smell even after showers but not having discharge. 
Did a urine sample that came back with blood in urine along with protein but NO bacteria so that leaves me confused. 
Did test swabs to check for yeast, BV, Trich, Chlymidia and Gonorihha per my request and ALL those tests came back NEGATIVE. 
I'm CONFUSED! 
She did end up putting me on antibiotic for UTI just to be on safe side but what could be going on?!?!?!