You definitely aren't alone. I'm going in for a consultation tomorrow, not even surgery itself, and I'm nervous about just that. But I know logically speaking this is the best choice and I don't wanna die of a heart attack in my 30's. I was obese, and had zero health issues in my 20's. Then the last 3-4 years they have just kept coming (I'm 36 now). High blood pressure, pre-diabetic, joint pain, kidney stones, gallstones (I ended up having to get my gallbladder removed).. and the yo-yo dieting has just not worked.
Part of what has been helping me is going through the success stories in this forum. Reading about how people don't have to deal with all these medical issues anymore. How it doesn't hurt to move around and general quality of life improves. I spend a lot of time looking over the Outfit of the Day thread, and before and after photos (thank you to everyone who posts in those!). I am still nervous, but so far I am finding that reminding myself of the reasons why this is the logical choice has been helping me keep focused and keep moving forward.