Can someone please help which temp?

So my Son would be going through a regression when I’m trying to temp! 😅 so I’m trying to do it the best I can.

I normally temp between 3 and 4, but last night I decided to do 2 readings which were:

36.08 degrees at 2:35am (this was after around 1hr35 mins of sleep)

36.47 degrees at 4:15am (this was after around 1hr20mins of sleep)

Which do I use because there is obviously a massive difference in both?! I’m really trying hard to temp but because my Son is up so much in the night it’s so difficult ☹️

I read online that your temperature increase by 0.10 degrees each hour so if you wake up later then subtract it.

Does anyone have any insight for me please?!