Positive OPK but No CM or EWCM

K

I have 3 kids & had no problem at all conceiving them. We’re TTC #4 & for some reason I’m not getting EWCM. Has this ever happened to anyone? Did you still get pregnant without having it?

We are on our 2nd month of trying & this is the 2nd time I’ve noticed that I haven’t had a change in CM. I got a blazing positive opk yesterday morning though.