On Friday I drove for 6h with air con on (had small DS in back who really feels heat) and when I got home I felt absolutely rotten. This then progressed into feeling freezing cold and shivering and having to curl up under a blanket with two jumpers on. Didn't want to eat anything and went to bed. All night kept waking up shivering and couldn't work up the energy to take painkillers. All my joints were really hurting especially my back/hips and my hands. Saturday morning finally got up and took some paracetamol which made me break out in a sweat and suddenly boiling but able to sleep. Slept all day Saturday but each time painkillers wore off I was freezing cold. I have the joint aches still but no other symptoms, no sore throat, no cough or cold symptoms. I've done 3 covid tests and all negative.
Basically all I want to do is sleep and I'm either boiling hot (when I take painkillers) or freezing cold (when they wear off) but I don't have a temp.
Any idea what this could be?