Glow changed AF date!

Kirsten
So my cycles are always 28 days and I had started temping this cycle. I know from tracking my CM that I ovulated around July 21. My temp rise was slow and Glow decided as a result that I O'd on the 28th instead which pushed my expected AF out by a week. 
​Which date is it? It's day 28 for me right now and no signs of AF.