So every month since I've had glow I've always been 1 week early for af so it will say af isn't due til the 10 but I would start exactly 1 week before it's been like this for 2 years since I've started to calculate... So now glow says I am supposed to start today the 10th but still hasn't shown now I have cramps but usually get them the 2nd or 3rd day of af I'm cramping with no period? I've taken 1 test a couple days ago. So my question is when should I test next.