BBT temp unusual?

Jacky • 36 years old, TTC baby #1

I have been taking my temp for the past 8 days and have had fairly normal temps but this morning (6am) my temp was 90.42.

Has anyone experienced such a low temp before? Could the fact that I was truly half asleep while I was temping cause such a low temp? Really confused right now LoL. And Glow is not letting me save this temp in my chart, not sure why.