Vfl then nothing?

Yesterday:

7a-Pregmate test with FMU, faint line.

10a- FRER test, negative.

7p- Pregmate test, faint line.

Today:

7a- Pregmate and FRER with FMU, faint lines on both, more visible on FRER.

12pm- Pregmate and FRER, negative.

So, yesterday I had two faint lines with different urine on Pregmate and negative FRER.

Today, I had a positive/faint line Pregmate and FRER, then nothing on either.

Whhhy? Am I pregnant or not??

EDIT: I added two Pregmate pics. They were from yesterday at two different times (7a&7p). These are the only photos I have, as I deleted the others being extremely frustrated. 🤦🏻‍♀️