Caffeine is like a purchase on a adrenaline system credit card, and your body's system is probably in huge debt - might take a while to regain composure.
Not sure if it's accurate or not, but it sounds plausible to me.
But the lack of energy is real and persistent. My body and routine are both recovering.
If caffeine makes you jittery or causes other signs of increased adrenaline that means you are probably in poor health. Note that it's best to take it with food or a bit of sugar and taking it while hungry or low on glycogen can cause a bit of stress.
Coffee is nothing but calming for me and I have zero withdrawal symptoms if I go a day or two without it.
Or you're sensitive to caffeine.