What does this mean?

What does it mean when you have a slight bbt drop but it doesn’t go back to your pre-ovulation temps? I had a .16 degree drop yesterday and today my temp was the same (98.03) but I’m still above what my temps are before ovulation(97’s) Is the slight drop bad news that af is coming or good news that I’m still above Coverline? Please help and thanks in advance :) I’m already 10dpo and usually get af between 11-13dpo also I didn’t track daily until ovulation occurred