Help with BBT

Hi everyone. I need some help. I had a blazing positive OPK on cycle day 12, I also had watery CM cycle day 12/13. This morning Ava readjusted my ovulation day to today cycle day 15, but I had a negative ovulation test and a large temp drop. Can anyone help explain? Do you think I ovulated yet or no? FF has "confirmed" ovulation and then taken the data away based on temps every other day. So I'm confused. Thanks for the help!