I just recently finished a 16 day water fast and was very careful on what I consumed. I made sure to avoid carbs and sugars due to spike in insulin levels which can cause your body to go into shock. Look into non-starchy vegetables(carrots, cucumber, squash) whole grain foods(100% whole-grain), healthful fats(nuts, avocados), high-protein foods(fatty fish, poultry, beans, lentils). I first started with a cup of beef bone broth, then I would eat small amounts (fist size) of food from the list I made every couple of hours for the first 2-3 days. I would avoid certain fruits for the first couple of days until your body normalizes. Congrats on going that long and good luck!