Hey - I'm sorry you're feeling bad. I get n* from fear very often, actually - I usually have to tell myself that it's just anxiety until I feel better. Anxiety can get rid of my appetite, too - there was a time when I was younger that I was fifteen pounds underweight. I'm no expert, but I've found it helps a little at night to distract yourself with whatever's on hand - the Internet, a game, a book, a movie. Then once you're tired, you fall asleep easier.
I know you don't want to eat, but it might help to eat something very light - like cucumber, or a roll. Sometimes if I force myself to eat, I realize I'm hungry.