I started using them this month on CD 8 as I have a short cycle (roughly 26 days). I got flashing smileys (high fertility) on Tuesday which was CD 11. I am now on CD 16 and still getting flashing smileys.
However, I installed Femometer, entered my information and it predicts I ovulated two days ago (which is what I'd expect). Also, the lines inside the clear blue are getting lighter. So have I missed ovulation? Or just not ovulated? I tested twice a day since Friday.