Your problem is probably not about weight. Since you are obviously addicted to food, and you went to jail for using drugs, you probably have an addictive personality. There is not shame in that, but treating the symptoms of addiction without looking at the causes and learning to manage the addiction itself will not do any good. I hope I do not sound judgmental, but you probably need some counseling. You need someone to help you learn to love yourself so that you do not feel compelled to abuse your body with food, drugs, punishing exercise and diets, or other substances. I am hoping very much that you learn to do that, because you are worthwhile, at any weight, and you deserve the best life you can give yourself!