What about life after surgery?

Ok, I have paid my deposit!!! I am doing self-pay so my surgery isn’t until February. The deposit is nonrefundable so it looks like I’m going through with it! The reality of it hasn’t really hit yet. This is literally life changing. But to be honest I’m terrified. I’m not scared of the surgery. That doesn’t bother me at all. It’s life after the surgery that scares me. How do I do “thin” or smaller in general? I’ve always been the thick or big girl. I know how to act and how to expect others to act. So after this surgery when I lose a bunch of this excess baggage how do I adjust? Is anyone else scared of who you’ll become after surgery?