AF due today, bfn, high CP?

Emily
Sooooo confused! Glow said AF is due tomorrow, but by my count it's today. No sign of her yet, and she usually arrives early morning. Took a FRER this afternoon, BFN. CM had been almost dry, now a good amt and it's watery, and cervix is really high. Am I just jumping the gun, or does it sound like I'm pregnant and hcg just isn't high enough to detect yet?