adjusting BBT temps due to waking time

3👼🌈💖2018🌈💙2020💖2021💙2023 • God's timing is perfect🙏⛪

I have a question my husband started working and gets up at 5 however I used to be be temp at 6 but for the last two mornings i b b tempt at 5 there's a BB temp adjuster I was wondering if I should use it or are my temp still accurate enough