Hi there, we bd on Sunday morning (CD 10) and I got a OPK peak on Tuesday afternoon (CD12) as well as EWCM. On about the same day my bbs went tender. Then on Weds evening the OPK was again negative. I know when you get a positive you are meant to O within 24-36 hours but can it mean you could also within an hour or so? And so does a negative test mean it has already happened? Because of circumstances we didn't bed again early hours of today (CD 14), so I am thinking we missed it entirely. Another month not quite there! Thanks for your help, G. x.