Anxiety and Questions

Hello! I am 17F, and I have a haller index of 6.2. I never realized I had pectus until one of my friends pointed out the bid dent in my chest one summer while we were swimming. I thought that every girl had that dent and it was normal. After looking back at baby pictures, we realized it had been developing since I was 4 years old. No doctor ever mentioned it, even when they noticed I had rib flare. After talking to the doctor and doing some research, we decided to go through with the Nuss procedure after noticing symptoms during my wrestling season, especially around my stamina (chest pain, trouble breathing, upper back pain). The surgery is scheduled for the beginning of this June, and as the date gets closer, the more nervous I get. I am not doing Cryo for fear of nerve damage or not feeling enough and messing up the surgery results. I was just wondering how the surgery is in general, tips, comments, etc. anything to ease my anxiety or help my knowledge with my upcoming few months of living with this.