I'm sorry your so sad right now Katie. Its ok to feel that way. You have to give yourself time and allow those feelings to be what they will so that you can move on. if you bottle them up it will take longer and be harder.
It really does seem that not many of us are getting our desired gender atm, and so many people on boy 4. This along with watching 12 week scans that have been confirmed either way on youtube (post made by ELP in Ultrasound Gender Predictions) has me even surer that I'm getting a boy. Feel OK with this atm but I bet by tuesday evening I'll be feeling just as bad as Katie. Just hope that the GD is short lived for all of us.