I don't see a BBT chart on your profile hun...
Hey I just checked out your chart and it looks to me like you o'd on the 28 October, that is when your temp dipped low and then rose steeply. The dip is actually when the egg is released and that is when you should madly be bd'ing .. hope this helps!
FF isn't picking up that I o'ed. Is this a problem? I also had a huge temp drop today. Am I out this month?