Have you had a false positive?

Cristina

I have long, irregular cycles, but today was what would be about average for a start day(31), but no AF. I just grabbed a dollar tree test and didn’t use FMU. But it shows positive. I bought a second so I can retest in the morning. Idk how accurate the DT tests are. Has anyone had a false positive? I haven’t said anything to DH yet, I want to wait to take another test. Or would y’all suggest getting a more expensive test?