I understand the fear of failure given I have lost weight many times and regained it. I am doing a few things different this time - I have very limited capacity in how much I can eat, I no longer have the rampant ongoing appetite, I too am working with a personal trainer to help the body adjust, and I have organized a few sessions with a Psychologist who has helped me through many life/health crisis's (spelling??). I'm also trying to stay more 'here and now' focused instead of loosing myself in future land. I'm not interested in giving myself a hard time about my previous failures - life is far too short. Good luck with your journey and I can only encourage you to focus on the positive.