Clearblue Advanced Digital Ovulation

Caitlin
I am currently on Cycle Day 19 and still seeing that blinking smiley face! I started <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> with cheapie tests (ran out of those) CD 12-15 all negative. Started using the clear blue on CD 15 and it was negative. CD 16-19 I have had the blinking smile but no LH surge. Anyone else have this problem? I'm on my first round of Femara and getting frustrated.