Advise please! 2 faint positives yesterday and a negative this morning!?

Kit

I did a FRER with fmu yesterday and got a faint positive them did a boots early test that evening and got a faint positive too then today I have done another boots early test with fmu

and it’s negative 😢😢 I’ve added the pictures top is the FRER and second is the boots early from yesterday, last one is the boots from this morning, any advise anyone please 🙏🏻🙏🏻💕