Sell on Tuesday morning, cut your losses, and never, ever look back.
Take the loss on your taxes next year, jump aboard a class action lawsuit train, and put this whole sorry episode behind you.
Boycott FB, and urge your friends to do the same. Take your story to the press, and get the word out.
You own nothing more than glorified MySpace stock right now. FB is much more vilified than MySpace ever was.
Good luck to you.
Do your google research, please. IIRC Morgan Stanley is talking about taking care of those who's buys were executed above $44, but you'll have to do the homework as to specifics.
But first, go find a flack jacket, because you're going to need it for the other responses starting probably before I even hit "post."