Stupidjaws, I know how you feel, seriously, its not easy. But you're moving forward with a surgeon you like and trust (right?) so you're in good hands, you NEED to believe it and you NEED to believe you're going to be better off for doing this. Im not saying glaze over the potential what ifs, but if you're going to do it, dont torture yourself.
I hope it went well, its hard to say because you dont know the real result till months down the line. I can say so far Im pleased that I can breathe SO much easier- breathing passage doubled, and my bite is spot on no more trouble with teeth hitting wrong or off... Also a lot of the excessive vertical length in my face is gone... The rest will show with time. Im comfortable with my decision so far, relatively content.