FRER false negatives?

Katie • Mum to a 4yo little boy ❤️ baby boy #2 due March 2024

Has anyone had a negative on a Frer after faint positives on other tests! Tested yesterday with two different cheapie tests and got vvfls then today did a frer and it’s negative. 4 days late and still no sign of AF. Any advice would be much appreciated 😪😪