UTI?!?! any nurses?

I'm 3 months pp and since I've had 2 UTI's and have developed a kidney stone. I was just treated for a UTI 2 weeks ago, and checked again and they told me my culture came back normal no signs of infection. (1 week ago.) I bought the azo test strips to check again myself because I felt as if I had being going to the restroom a lot. The leukocyte came back mildly purple and I was negative for the nitrate. I do have a bad yeast infection and I don't know if that could cause a positive leuk. It is Sunday so I am going to try my hardest to get in with my doc in the AM. But anyone else experience this and it wasn't a UTI? Could yeast cause a positive leukocyte?