I suspect I have quite a short surge, and I was only testing once a day - the "almost" tests were about 32 hours apart. Do opk's show a fairly strong (but not pos) line on the other side of your surge - or does it just disappear after you've O'd?
I think it's the EWCM that has me confused, I normally only get it for a couple of days when I'm Oing, then nothing for the rest of the cycle.
Poor hubby is exhausted already! He has a low sperm count, so I'm not sure dtd every day, even around O time is the best thing