So I thought for sure today I would get a positive OPK because I had some EWCM...but I got home and tested and the "test" line didn't even show up faintly. A day or two ago I got a faint line, but it certainly wasn't positive. I'm new to this stuff...but does EWCM show up a few DAYS before ovluation? Or how does EWCM and OPK relate? Thanks in advance!