Are you taking electrolytes? There’s also the possibility you have Covid. I had the same question Monday when I had the worst headache I’ve ever had in my life and it ended up being Covid. Whatever this new strain is it’s sweeping the country like a wild fire.
I’ve recently completed my first 96 hour fast with zero supplements which was a mistake and naive of me. I had sleep issues, headaches and muscle (weirdness) in my legs but on the whole felt better for it. I dropped 9 lbs too. My next fast will 100% be done with a supplemental product probably snake juice as it’s so recommended and fairly priced online.