Varying temps from 5am to 7am?

I typically temp around 7am wen I get up. And it’s been rising 🙏🏼🤞🏽 however, the past two days I woke up around 5am bc of husbands alarm, and took temp then, and the temp was lower. But then I took it again at 7am just to double check and both times it went from 97.8-98.3 something

I don’t know what I’m doing hahahaha. I’m preferring the 7am temp bc I’m TTC! Lol. Any advice is greatly appreciate. 💛