Christy- I haven't ever used the clear blue monitor, but my wondfo strips get darker the closer I get. For me, the line gets just a tint darker than the control (and that's only if I catch it) I have found I have a very short surge... so I try to just bd as much as I can until my temps confirm an O... and I usually get a pretty significant rise.
Today I am a little crampy, temp really jumped today again, so I am thinking that I O'ed either Tues night/ early Wed... only a couple days in there of bd'ing so I hope its enough. Only time will tell I suppose.
Hang in there ladies, our day is coming!!