white blood cells in urine???

i went to the doctor for nausea loss of appetite stomach cramps/rib/ back pain. i haven’t been urinating frequently no burning no fever no smelly/cloudy urine yet my test came back positive for uti. can menstruation cause a false positive test? i feel like my symptoms are due to bad acid reflux cause i’ve had gerd for a while now. my blood works are good so there is no other infection like cancer or anything that would cause wbc in urine. 

I would think menstruation would definitely be a cause if the symptoms. I also get inflammation down below but once I take AZO it's so much better.