I'm no expert and I have no idea regarding timing of a positive OPK and the consistency of CM, but I do know that for me this last cycle (and I write everything down, every detail so I can track it

) for me....I had EWCM on CD11 with a negative OPK and then on CD12 I had a positive OPK with very little to no EWCM. I know every*body* is different, hopefully tomorrow you will get a positive OPK
I personally believe that EWCM means I'm fertile and getting ready to ovulate.
Tons of good luck to you