Northern Lights

I have the same surgery date. I am beginning to feel anxious. Thought about rescheduling it. My family is supportive and ready, and truly I want to do this, but just have failed so many times at staying with a diet that I am having self doubts about the long term of making permanent changes. I also really have not told anyone and my plate is full before and after surgery. I have keep three weeks to myself but wonder if that will be long enough?