New to BBT - Help please 😔

KK • #1 Jan ‘20 💙 #2 Jan ‘23 🌈💙

Hello! This is my first time charting my BBT. Does everything look okay? I was surprised to see my temp drop at 1 DPO today as I thought I would get 3 days of increased temps. Advice please!

Also, how do I get my cover line to show?