Wtf!? OPK

Question

Took an opk test yesterday & got a blinky smiley face (HIGH) BUT when I re-tested a day after there was a blank circle (LOW)...I never even got a PEAK reading...wtf!? Did I miss the peak, lol?!

Answer

Which daytime did you test? Which cyclus day did you test? How long is your cycle usually?

Answer

Did you test both in the evening?