Ovulation Question- BBT and OPKs

Alex • Expecting our first baby on December 1, 2016 and loving every moment of pregnancy and the final months of just us <3
Ladies-
Advice and eyes please- when did I ovulate? Is ovulation the day you have a drop in BBT or is it the day you get a positive OPK? Also, has anyone successfully got a BFP and those two not match- meaning did you ovulate based off BBT and not OPK?
Got a positive OPK tonight but BBT had a significant drop Monday- help!
Nervous I missed prime BDing time.