Well, you could cut off Vitex at day 14 since that's average.. ? :)
Two hours ago I had milky white non stretchy cm and now I discovered a GLOB of 4- in stretchy clear mixed with white cm, but my OPK isn't yet positive yet. Weird!
I'm almost 2 weeks to the day of my M/C. I stopped Vitex yesterday incase it was holding O back.