The reason I ask is that it gave no high readings this month, went straight to a peak on CD11, which is about 4 days earler than I normally ovulate at. We could BD the first peak day as I had my smear the next day and I was advised not to. However today CD15 I have had cramps and LOTS of ewcm, my question is this, can the cbfm give a false peak reading? If so, what is with the CM today? I did a OPK today and got a negative.