how do you get things done when its hard to move?

Last night was bad. I couldn't sleep (because I was crying). I had nightmares and sleep paralysis. Now, I need to get stuff done. Class. Study. Work. But I feel deflated. I can't do anything but stare out the window.

How do I do what I need to do?

I know I am physically capable of moving, but the hours continue to pass without me moving and it feels like it's out of my control.