I use Clear Blue Advanced Digital and plan to keep using it but am considering also using a cheap OPK to test AM/PM to try and narrow down when I have my LH surge. I feel like even though I got my "peak smiley" with CB last month, I feel like I ovulated later than I should have. CB is great but just too expensive to be testing multiple times a day.

Ideally I would love to know exactly which day I have ovulated but BBT isn't ideal for my lifestyle because of my chaotic wake/sleep cycle. (I'm an ER nurse who works all sorts of random shifts and days). So maybe I'll try this method instead.

Any input?