BBT'ers. I have a question!

Jaimee
I've just started tracking my BBT and been doing so the last couple weeks ( I know your supposed to wait for at least three cycles until you can get a feel for patterns) but I'm curious what this could mean? It's a pretty significant drop in temp and I'm completely ignorant to BBT. 
Thanks in advance and baby dust to all! 
✨✨✨✨😊