Eurgh those moments are utter shite. I can only tell you about my experience and what I've found that helps. My really grim moments don't last forever. I had two/three really poor days just now, but usually, an hour or two later I'm back raring to go, most of the time. I get low anyway, but these are worse. It's important for me to reset and lose the worst trains of thought that plague me at that point.
So I'd say, don't be afraid to head back to bed. I'll sometimes take a 30 minutes powernap, reset, wake up having forgotten whatever was going round in my head, ready to try something else. It's good for passing 'somatic' anxiety and depression. Little bit of sugar will often help as well.
Sounds like just COVID TBH. My uber cold thing comes regularly, 5-8 hours after waking up. Sometimes I catch it, sit in front of the radiator, then I'm ok. Last few days, went to bed, then I'm burning up big time.
The twist is probably that your warmth and blood is funnelled back into your core to fight the infection. Your extremities can get very cold. Your head can be an extremity or it can be the destination for the heat. This is complicated by COVID being shit for your circulation.
Either way, you don't need to bake yourself, just don't let part of you get cold. My guess is it throws the thermostat during a tricky operation.
Do not take Ibuprofen on an empty stomach. Try to eat something. Even if it's just something small and sweet. Hot tomato soup is brilliant. Later, water, water & more water for inflammation
Eat nothing and you're robbing your body of stores of energy. Your body will be in a keto frenzy. Which really isn't all that comfortable anyway, can be flu like and depress you. Give yourself a break, sugary hot drink, suck a sweet or have a bit of chocolate. Hot ribena is a favourite. Just don't get hooked lol.
