BFN but AF isn't showing her face!

Genie • We are trying for our first baby!!
My AF is due today according to the <a href="">glow app</a>. I have been tracking my cycle for 3 months now and the app has always been on point. 
Took the clear blue test this morning with my first morning urine...BFN, no positive line at all. not feeling any cramping, my breasts and nipples have been itchy for a couple weeks now. 
Any thoughts other than just keep waiting? Tired of waiting...feeling impatient lol :) but that is the case...