My temperature its been fluctuating between 36,3(97,4F) in the early morning and 37(98,6F)/37,2(99F) in the afternoon and the early night. It starts to go down again at 11.30PM always. I've been registering my temps for long time (yes, I'm obsessed), taking it in my armpits and sometimes in the mouth to compare, and then I realized that it seem that it's just my normal temp cicle. Maybe you already know that the body temperature it's lower in the morning and it reaches their highest level in the afternoon (around 6PM), it's the circadian rythm and it's equal to EVERY human. The body temperature can be also elevated after a shower, after a meal, after exercise, due to anxiety and strong emotions, being in a hot room, etc, etc, etc. Yes, our temperature isn't too "stable", but that changes doesn't mean nothing sinister or dangerous for us, our bodies are pretty smart. If you wanna make that experiment just take your temp early in the morning, at midday and then in the afternoon and night.