No Lh surge CD 20 ?

Anne
I'm having a weird cycle. I use the clear blue digital monitor and have been using for about 8-9 months. Almost always get peak days CD 12-15. I had EWCM days 12-15 and high fertility for the last 10 days. I've now dried up and still no peak days. Wtf. Anyone else had this happen. Hoping this weird cycle finally means a BfP