Hi welcome. I mut say first you must reduce your stress, check worms, or indigestion disorders if any, sleep more, restful work no starinous. add green salad, fruits, strew,soup , more vegetables oriented foods,some citrus fruits, more water,
electrolytes, avoid heat or hot ,normal working & 2 hours alternatively high carbs enriched with high quality protin should add. You can add FRESUBIN as energy apart from meals.