2 Days till banding

Today I feel overwhelmed and worried that I will cheat the band. I had a phone appointment with my psycologist today and as she rightly pointed out I need to work on 'complience' - or my ability to stick with it. This is the rock in the bottom of my stomach. I have only ever know failure with my weight or short term success, so it's very hard for me to be 100% positive that I will do all that is necessary to work with the band. I dont know what i'll do if I fail again. I want to change and need to change so much but in my head I keep doubting myself.