Timing of OPK's

[nagromeyk]

Hi everyone,

What time of day is best to do OPK's? I am thinking of getting the clearblue digital one. I saw it in the chemist the other day - it either gives you a happy face when you are coming up to O or a sad face if you arent, thought that was pretty cool and far easier. No need to try and figure out if the line is darker than the other

I am not temping this cycle so thought I would try using OPK's to pinpoint O. My cycles are still a bit screwed up

Anyway your comments and suggestion are most appreciated.... TIA

EDITED: Oh and what day do I start using them from? say if I assume 28 days, last months cycle was 23!!!!! grrrrrrrrrrrr... stoopid body! lol