I know my last cycle i actually had two bouts of the EWCM and the first one i thought for sure i was about to O, as i usually get the EWCM then watery and that is when i O. It was infact when i noticed the second lot a week later i think if i remember correctly (a Sunday night), i did an OPK instantly and got a positive so i thought i was going to O the next day, then Tuesday had watery CM sorry for TMI and got another positive OPK and then Wednesday my temp rose significantly too show i O'd on Tuesday.

Anyway i always find that after the EWCM i get watery CM then i O, but everyone is different.