Glow to prevent pregnancy

So I've been using the Cervical mucus method for about 10 years, and recently my cycles have been getting longer and a little less regular, so I decided to step it up and get a little better about tracking and maybe start temping. I thought Glow could help with that, but this is my first cycle on it and the 3% likelyhood of pregnancy number hasn't budged at all in weeks, even as I began tracking the beginnings of fertile quality CM. Is this a bug? Shouldn't the likelyhood of pregnancy be going up?