I'm so sorry . . . I was afraid of this. Try not to make ANY decisions (and CERTAINLY no ultimatums, one way or another!) this weekend. It's going to be difficult, but do you think you can fake it until you've had a chance to do some decision-making?
Try to hang in there. It sounds stupid, but MAKE SURE YOU EAT (you won't want to). Breathe. Go out with a friend. And, if you're so inclined . . . PRAY.