BFN still no AF????

Dannitra
So, I'm tracking AF on 2 different apps, this one and Ovia. According to Glow, I'm due tomorrow, according to Ovia, i was due yesterday. My personal count had me at Tuesday. I tested yesterday, BFN still no AF. I've been cramping since last week, but I'm trying not to get too excited. Any of you ladies ever been in this position??