Arm chair psychologist gather up

i have something important coming up but I really really don't feel any motivation to do it, even when my future depends on it. i know and aware it's a very big deal and me dragging my feet and delaying it is self sabotage but I just couldn't make myself move, for some reason. my body don't want to. my mind is split, half is constantly yelling at me to do it and the other just want to lay down and die than do it.
this also extend to my well being. I'd rarely go out or drink water. i know dry lips mean I'm dehydrated and I really don't want kidney stone, but I just... don't have it in me to just move and take a few sips of water. i dont know what's wrong with me