Jean -
Sorry to hear that certain family members are not giving you their full support. You might be surprised, though, in the end. Certain family members that didn't seem supportive really came through in the end when they realized that I was doing this whether they liked it or not. I did a lot of educating people because they either thought it was a horrible last resort or like you said, as simple as a tonsillectomy. Don't give up on them and hopefully they haven't given up on you.
Good luck for your big day. I'm sure you'll do just great!
Heidi