The blues

right now I am feeling so alone - I know that in order to have a healthier life this is something I have to do but if I say I am afraid out loud everyone instantly says, you will be alright or why are you doing it.  I wish I could take their word for it that I will be, but I am not at all sure.  I've only been seeing the nutrionist now for 3 visits and I havent seen the actual surgeon since she suggested the bypass as opposed to the sleeve.  How do I really know what is best for me when I've had no conversation beyond the initial consult with the Dr. who suggested it?  My anxiety is growing daily.