Body temperature

Malerie

Hi I recently just started tracking my BBT and it seems wrong. My BBT is higher when I first wake up than when I’m up and walking about. Is that normal? I am trying to get it to be accurate for tracking but I think it’s just wrong. For example, my temp when I first woke up was 97.6 and then I took it a couple hours later (just to see) and it was 96.7. Is that normal? What am I doing wrong? Thanks!