Which temp should I use?

Alexis

I had some trouble sleeping last night. Took my temp at 4:40 (about an hour before I usually take it) and it was 77.75.

I took it again at 5:20, after I’d gone to the bathroom and tossed and turned a bit more, and it was 78.00.

I fell back asleep and took it a last time when I woke up at 6:40 (about 49 minutes to an hour after I normally take my temp) and it was 79.95.

Which one should I use? I’m CD 21 and 7dpo. Thanks!!!