I just had my surgery this Tuesday and despite doing the research on everything for the surgery prior to making a decision, I still had a major anxiety attack the day before my surgery and started reading more of the complications and really letting it get to me.
I did get an actual anxiety prescription the day before just so I could be well rested and relaxed going in which really helped.
What I can say is that I'm doing good, although I've picked up a cold and a bacteria infection unrelated to surgery so immune system is clearly lower the week of the surgery. Probably pushed too hard as I went back to work Thursday after a Tuesday surgery which was a mistake.
My dad had the surgery 10yrs ago and has lost 150lbs and is likely only with us into his late 60s as a result of this surgery which prompted me as well.
I don't feel very hungry, so unlike diets it's nicer. The stomach pain and nausea will be nice to recover from in a week or so, but I am feeling up beat and have dropped 10lbs just prepping for the surgery and since so there is early results.
Good luck and stay calm!