Temperature

So I’ve been eating 3000+ for two days and my waking temperature has improve a ton!!! After day 1 it was 99 and day 2 it was 99.2 F. But my afternoons have been 97.7 or below. Why are my waking temps higher than afternoon? I do eat in the middle of the night which could be a factor. Day 1- 3000 cals
Day 2- 3500 cals
Coming up from a week of 1500-1800 and a log time of 1100-1500

I have had secondary adrenal insufficiency in the past. Now probably just adrenal fatigue. Symptoms- blacking out a lot, low hr (40’s), low bp, extreme exhaustion, hypoglycemia, headaches, double vision, Raynaud’s disease, cold hands and feet, dry skin, irregular/absent period, and I’m sure a few more that I’m just forgetting.