Bfn 4 days late am i out ?

Ni
So af is now 4 days late and yet another bfn. Hardly got any symptoms except slight nausea during the day.and maybe a bit more tired than usual. Checked my cervix and its really high I cant really reach it and My cm looks like a runny nose sorry Tmi. I just don't feel like af going to start, yet don't really feel pregnant either. I mark period as late on glow and it keeps moving me 2 days later and still nothing. Has anyone else been late and not really had many symptoms and got a bfp later ? It's driving me nuts.