Some women have a longer LH surge than others so their OPK will show a positive for longer... your body could be gearing up to O and just hasn't released that egg yet. I would keep BD'ing until at least a day after you aren't getting true positives anymore.
* CARLY * proud Navy wife to Lee (3.19.05) & Mommy to 2 Amazing Boys
Logan (12.20.06) and my RAINBOW Landon (06.28.13)
Baby #3 coming July 2015