I understand this is a scary time for you-- trust me, in that your first week you HAVE to follow the rules, take it easy, and keep those portions small. It'll be a lot easier than you think... I lost 12 lbs. my first week alone and it just starting falling from then. I was VERY doubtful that I was going to lose any weight at all, and then they said "Oh, think 100 lbs. lost, Rachel! You're not just going to lose weight, you're going to be a brand new person!" And I doubted. Then I lost. And my confidence skyrocketed, and I felt like I was released from this prison that I didn't even know I was in.
It's a lot more dramatic of a change for people that are younger--- we put a lot more into our looks I think. Please keep up with the forum, and go to the support groups-- they will help immensely. Even though a lot more people getting the surgery are older (most of the people in my support groups were 40-50 years old), we're all human, and this is a lot easier conquered en masse than alone. Also, look to the support of your family to help you through it-- mine did a lot to help with my Portion Control and push me through the tough times.