Ok - so I have regular cycles 26-31 days every month.  3/4/ days heavy bleeding each month.   Last month I detected LH surge x 2 days but low temp change - this month using CB dual monitor I had estrogen surge for 5 days then LH surge (Peak) on afternoon of 5th.   That was 3 days ago.  I had ovulation pain etc.   But no big BBT spike (taking vag).   Everything but BBT points to Ovulation.   This isn't breakthrough bleeding I have it's heavy period bleeding.  I am 37 and have 3 children - youngest is 11..    anyone have a similar experience??? I'm really thinking I'm either weird with BBT or not ovulating :(