BBT Drop

Courtney • First child beautiful son born 5/6/2015. Second son born 9/8/2016. Third son born 3/9/2018. Baby #4 heaven baby Sept 2018.
Has anyone had their BBT drop around dpo10 and still got a BFP? My temp post period is normally 96.5-97.7 ish range. After ovulation it is normally 97.6 -98.90. The past couple days it has been in the high 98.+ area but today I woke up and it's 97.70. Just curious if that takes me out or not.