It is perfectly normal for you (and your mom) to be a little nervous. It sounds like you have thought this through really well and have made an educated decision. You are also right about being able to lose short-term and struggling long-term. That has been the story of my life.
Keep focusing on your pre-op diet because it sounds like you are doing well on it. Every pound you lose will make the surgery easier, and will be gone forever once you have the surgery.
Best wishes!
-Mike-
__________________
TT Squishybear
"If you are going through hell, keep going." - Winston Churchill
05/30/07 Open RNY
430/346/240.5/225?
Highest/Surgery Date/Current/Goal
6' 2"
TT Gym Rat Club Member #65