Help please!

I’m not sure which temp to use. I got woken up at 5:40 my 2 year so I checked my temp real quick before getting up it was 97.6, I walked down the hall to her room picked her up for a second and came and laid back down. I woke up at 6:30 and checked my temp and it was 97.9, this is time I normally check it, which temp should I use?

I know you’re not supposed to get up but I also know the earlier you check it the lower it will be so not sure if that’s accurate either? I think I am 3 dpo(I think)