I think you are getting cold feet. When you start to think about the what ifs of what bad could happen think about the facts of it. It rarely happens, and if your surgeon is good it most likely won't happen to you. Also, think about the good things that are more than "what ifs" because they will happen. Think about how you will lose weight and fit into clothes you love and be able to do a lot more things that you want to do! Whatever you do, don't cancel it! Just stick it out, it will be over before you know it.