bbt struggles

Betsy
This is my first time tracking BBT and it's no fun at all, lol. I can't seem to keep a consistent temping time because I semi-frequently wake up in the middle of the night. If I temp then will it make my chart look wacky? Because it DOES look wacky. Also, am I the only person who's normally around 96.8? Why is my body temperature so low?
Thanks :)