I agree with Bobbie. More than likely, you will be ok since you are healthy and young. I have five fusions. They were painful but no problems. I am over weight and in my sixties. I will tell you I have confidance in my surgeon. Do you know anyone that has ever had spinal surgery? I know several since being on the forum so long. None has ever died from the surgery, that I know about. I have had seven back surgeries myself, and no problems. I was scared the first time tho, so I can understand your fears. I was 50 before I had my first back surgery.

Talk it over with your surgeon or GP. Let him know of your fears. My doc told me he had done over 4000 before mine. That calmed me down. If you have any questions let us know.
Good Luck,
Fancylady