I started using clearblue easy read opks at Cd13 & now it is cd26 and I still haven't had an LH surge! I normally have longer cycles (38 days) but last month AF arrived at cd28. Glow now predicts AF will arrive this month at cd41. I test with fmu at the same time every morning. Is it possible I missed it already? Or am I just not ovulating this month? DH says not to worry, but is this normal?