Late Ovulation?!?!

JT

According to another app I use I should have ovulated on 1/21 but when I was testing using Clear Blue Digital I was getting empty circles. I have been testing every day and monitoring. Since Wednesday i have been getting blinking smileys indicating high fertility. Hoping for a peak tomorrow, as Glow says I should ovulate tomorrow 1/26, but it will be CD18 is this normal? My cycles are usually 28 days...