So frustrating 😩

So according to the glow app I’m 2 days late. My average cycle length is 28 days. I tested this morning on FMU and it was negative 😭 I’ve been having cramps for days thinking af was coming, I’ve been thinking it’s on it’s way because of the cramps but nothing! Usually I can wipe and i get a slight red tinge in the lead up but there’s absolutely nothing, other than being a bit ‘wet’ I’m really at a loss now! 😩😢 my lower back is hurting and I’ve been having a sore throat and sniffly nose.