Opk fluke?

morgan

I started letrozole 2.5 cd 3-7. I’m on cd 16. No positive opk. Not even close to it. The first time I conceived I was positive by cd 16!

I have the cm , high sex drive, and cramps! Is it possible I’m ovulating but just not getting a positive opk? Has this happened to anyone else? Otherwise it feels like I might start my period soon 😢