I thought CM was supposed to be one of the most reliable indicators of ov? I had really wet CM for around four days starting CD13 but CBFM reckoned I was fertile about a week later. During the period I was getting highs on the monitor, I had creamy cm as I would normally at that stage of my cycle. But it seems the CBFM was right as I am now on CD33 with no BFP when my longest cycle before this has been 30 days. I don't have a clue what's going on with my body and it's really frustrating me. is it worth going to the doctor if CM is not correct around time of ov? I should be coming to the end of 7 months TTC now.