On night shifts I drink 1.5 liters of coffee, and my body starts to shake ☕

On night shift days, I usually drink 1.5 liters of coffee.

That is 3 bottles of 500 ml.

When I drink the 3rd bottle, my whole body always starts to shake somehow.

Something like a spasm happens.

I beat my sleepiness, but now I feel like I am losing to caffeine.

I feel like a smartphone on vibrate mode.