TTC & UTI

Ok so I went to an appointment last week. AF showed up on schedule on 04/13 & still going on. This morning the OBGYN nurse called & said a culture I my urine came back positive for UTI ( only symptom I had was a little frequent urination) given test at the office came back negative I asked them to send for culture to make sure since we're TTC. Currently I have No symptoms & I dont know if I want to start on antibiotics if nothing is wrong. Should I call & ask for a second screening? Can this be done while AF is visiting? My fertile window is 04/21-04/27 and I certainly don't want to miss this month chance but if I'm not healthy there is nothing I can do. Please Advice & share if you have encountered similar experiences. Thank You!