None of those tests look *quite* positive to me hun. CD 20 looks close, I actually think the am one more so than the pm, but the line is still a tad lighter. Maybe you're going to O late? Or maybe the tests arent that sensitive and you just never got a super positive read. This is the first month my opks have been like oh crap...no need to look at that one twice lol. in past months they never really got darker,...just closer to the same color. FX for you!