Can anyone tell by this what's going on?? I'm new to BBT...thanks! The last two months I have gotten a smiley on the regular Clear blue OPK CD 20 and then 21. This month I switched to the CB advanced and I only got high readings and it also shifted my "fertile" week a week earlier (I've read the monitors can take a month to figure out your body-wish I wouldn't have switched) I also tested on wondflo OPK and the darkest double lines I got were on CD 14 and then CD18 (they were almosttttt the same as the control line)