Getting back on program

Hi, I was sugar free for years due to this book. I was also gluten and dairy free for health reasons. Due to extensive travel i have gone back to eating everything and have been overeating everything to the point of being physically sick. I have also gained a tremendous amount of weight. I desperately want to go back on my program. I am starting tomorrow. I know to do the food but am feeling weak lately. I am committed though and am looking for support. I appreciate any encouragement. Thank you, Victoria