I've been using an OPK this month and so far I have not had a single positve test for my LH surge.  I'm on cycle day 20.  My CM was very much ontrack this week but no positive test.  So I figure this means three things:

1.  I havne't O'd yet.  Seems a little late since AF is due on 9/29.  She's been like clockwork for 4 months.

2.  I'm not O'ing at all.

3.  The test isn't strong enough to detect my LH surge. 

What do you girls think?  Any experience with this?

hmm.. maybe its one? i didnt know 2 could happen though...

every time i've used one, i've gotten a positive, i do it in conjunction with my cm...when it looks right....BUT..i'm still not preggy...so go figure!

I've gotten all negatives before. Maybe you're urine is diluted are you drinking alot of water? Or you might want to test twice a day so you don't miss your LH surge. I get the kits with 20 test strips so I can do it over a longer span and twice a day until I know around what cycle day I ovulate.

Finally!  I've had two positive OPK's the lastt wo days.  I'n on CD 22 for Pete's sake but they are definitely positive.  I got it yesterday at 5 pm and then again at 8:30 am (not FMU.)  I know its still a long shot to get pregnant but I feel so much more in control and like we really have a shot this time.  thanks for your help ladies.

Yay for the positive OPKs, BlueBride... I also hear that you should test bt 10a-8p for more accurate results...  GL for this cycle...