I was completely convinced on Sunday that I was not going to O this cycle until something ridiculous like CD42. My CM apparently dried up, my temp was that of a person near death (96.6), and my OPK was negative.
I wasn't even going to do another OPK on Monday, CM was still practically nonexistent, but a friend from the HA board said that I really should because you just never know. My OPK from the day before had appeared a bit darker, but that just seemed like the pattern I'd already observed twice before this cycle.
So... I peed on another stick on Monday. To my complete astonishment, it was an almost positive. And as I had had a lot to drink and gone to the bathroom 2.5 hours before, I figured that was good enough.
Temping confirmed my O (my THIRD!!!) on Monday or perhaps Tuesday. CD 27/28. About flipping time :-)
So now I'm in my second first 2ww. Not expecting much, but having a smidgen of hope.