I've deactivated facebook a few times in the past because it can be an awful thing to have. You find yourself comparing how happy you are against how happy others appear in their photos they post or you get bogged down in reading other people's problems. I also feel if you're in a relationship it can destroy it, especially if one person is so obsessed with it they spend more time on it talking to people than they do you.
Well done for making the move of getting rid of it, I would keep it off at the very least until you feel better in yourself and I would also avoid things like the news too until that time comes.