TMI post!! Heads up!!

Okay so can someone answer me this.... so according to glow, the cervical mucas that means you’re fertile is raw egg white yes?? So how is is that whenever glow predicts I’m ovulating, I don’t have anything like raw egg white CM?? It’s usually the week after they say I’m ovulating that I have egg white CM.... so is glow getting my ovulation week wrong? Or am I still fertile on my ovulation week even though I don’t have egg white CM?? I’m really confused?