I’m trying to take my bbt at 3am since i always have interrupted sleep and seems like 3am is the safest time that i always have uninterrupted one.

So yesterday i temped at 3am and it was 36.20C and then i went back to sleep and woke up at 6am without being interrupted and i temped again and it was exactly the same at 36.20C.

Today, i woke up at 2:15am slightly panicked because of a weird dream and my phone fell so i had to get it (i didn’t get out of bed, but i did take it from the floor) and my temp was 36C, probably went back to sleep at 3am and woke up at 6am without being interrupted and my temped was 36.30C

I’m just wondering here on why yesterday i got the exact same bbt whilst today it was different by 0.3; if anything the only thing that’s different is today i woke up abruptly so I thought it should be higher..?