I always thought I ovulated around CD13/14....I was wrong I actually O around CD9! May be beat to start testing as soon as AF finishes just in case you don't miss your window. 

Totally in the same boat. Wish I had a success story to tell you but still too early. This month I used Clearblue advanced OPK (which I used last month & was right on) but this month I had 13 flashing smileys and NO peak!! At the point when I was ready to slap the smiley off it's face I just stopped testing. Hubby & I are BD'ing every night & I hope I just missed my surge. Waiting for the positive was just too stressful & I couldn't stand the sight of the flashing smiley for another day. 

I am on CD 15 and 3days into my fertile window with no positive OPK's. I've had a light, and semi dark lines on my test strips, and no LH surge on te digital ones. I know it only lasts a certain amount of time so it's possible you missed it if you're only testing once a day (which is what I do)

I didn't start testing till a week after my AF, and I been testing with Early Response OPKs and no positive yet.. Just hoping that I still ovulated and the OPK just didn't detect it.

Which OPK are you using?

Im sorry dear, I dont have a success story but Im also in your same boat. Im CD 41, I used CBFM as well as CB advanced digital OPKs simultaneously (i know, im soooo obsessive) and never got a peak. This is the first time in 11 months that I didnt get a peak.  Praying for a miracle, but i have no expectations. Are your cycles regular?

Please share your stories.. I'm in need of some uplifting comments.. I haven't yet gotten a positive with my OPKs this month, but just prey I still ovulated and the OPK didn't detect it.