Temping ladies.. Got a question for you, 😬

Danielle
Do you take your btt once..
I've not long started temping and I take it via mouth as soon as I wake to my alarm. However I only have been taking it once and going solely on the first temp I have.. However this morning I curiously did it twice.. First temp was like 36.5 second straight after was 36.3.. Would you go by the first temp or do it a few times before you decided which one you would use? I then did it a 3rd time again and was 36.5 again so I used this to log