you should ovulate anytime from 12-48 hours after a + OPK...
you may still have EWCM up there by your cervix which is what you need
It may sound silly and could just be coincidental, but yesterday I had like no cm at all but thought I should be ovulating, I drank some grapefruit juice and a couple of hours later I actually had some ewcm, just a little bit. Its possible it was just a coincidence but couldn't hurt to try! GL!