Make sense of this for me PLEASE!

Alex

Okay I’ll try to keep this brief! I started testing on 8/4 PM. It was negative. 8/5-PM I see a vvfl. Then today, 8/6 FMU another negative. And NOW today, 8/6 PM darker line positive! My period is due tomorrow! Does anyone know what is happening or has this happened to anyone else with the FMU not showing up but the afternoon pee shows positive! Gahhhhh! Thanks in advance!