Hi, I am new to this forum so hopefully I have done this right. I am TTC #2 at present and although have had many 29 day cycle months the last two have been 37 days and 35 days due to being sick. I have been using OPK and got aln almost positive on Sunday and then a definite positive on Monday but negative from there. We did the BD on Thursday night, Friday night, Satruday night and Sunday night and then not again until Wed morn. Do you think I would have captured my O? I was at CD29 by the time I got the positive OPK.