false negative

R
Hi ladies! I am now 6 days late on what normally is a regular 31 day cycle. My husband and I have been Ttc for 4 months now but I have only gotten bfns on the 4 tests that I've taken the past 6 days. I have read that having a uti could interfere with results causing a false negative. Have any of y'all had any experience with this?? TIA