My temperature dropped :(

Naomi • USAF Wife! ♡ Been married for 4 years, 27 & ttc baby #2. DS is 13 months old.
I am 11dpo today with AF due 9.22. My temperature went from 98.7 on Tuesday (9.16) to 98.1 yesterday (9.17) to 97.9 today. Totally bummed. I'll see what happens these next 2 days. I might not test Saturday afterall.