New to charting

So I’m very new to charting... i know you’re supposed to take your temp first thing in the morning. I usually go to sleep by 10pm and wake up at 5am... I have my alarm set to 5am to take my temperature before getting out of bed.. my question is if I keep waking up at say 3am every morning and just lay there and eventually go back to sleep, does that effect the temperature? Or if i have to pee at 2am and go back to bed.. will it still be accurate at 5am since I got out of bed?? Any other advice or tips are appreciated!!