Ovulation Chart Help

Meghann
I am on CD 21, and this cycle and last cycle I didn't have a big temp jump after ovulation, though I clearly have higher temps in literal phase. I had a positive OPK both cycles, as well as EWCM. I had my regular OBGYN appointment a couple of weeks ago and she said I probably ovulated and to go by the OPK. 
Does anyone have any insight or a similar chart?