So from top to bottom, these pics are CD 16, 17, 18. Today's OPK was even lighter than CD 18. Did I O on CD 17? I wasn't expecting to O until CD 21, Saturday. Usually they get darker for several days, then two in a row of darker than test line. Was that just a fluke sorta dark line? I'm stressed bc now the OPKs are light, so I don't know whether to expect them to get dark again. I'm going to keep BD'ing through the weekend, but I'm confused! To add... I've had EWCM most days this week, and red tinge streaks in it yesterday and today.