Breathe. No freaking out. WHY do you want to have this surgery? Really, Why? For me, it was to improve my quality of life. To not hurt ALL THE DANG TIME. To tie my shoes, to not be embarrassed and even horrified to be captured on film. To not be judged based on my size before I ever speak a work. To not have to shop in the plus size section of the store. To want to get out of bed. To feel worthy. I could go on and on, but I think you get the picture.
So, when you start to freak out, remind yourself WHY you wanted this in the first place. You'll be ok. Breathe. :-D