I've just started using OPK strips in addition to my BBT over the past few cycles. Nothing spectacular, just those Wondaflo strips. I don't ever seem to get a peak or a definite positive on them.

Anyone that's a regular 28-30 day cycle, when do you usually start testing? I feel like I'm starting too late. My ob/gun told me to start on Cd11, but I feel like I should be starting on maybe cd#9

Any of you ladies have suggestions?