Your symptoms?nausea, excessive hunger, loose motions, and fatigue?suggest a gastrointestinal infection, a metabolic issue like an overactive thyroid, or possibly early pregnancy. To manage this at home, stay hydrated with oral rehydration salts (ORS) and eat small, bland, easily digestible meals. Avoid spicy, oily, and heavy foods. Since these symptoms are draining your energy, it is important to see a doctor for a proper diagnosis. They may recommend a stool test, blood tests, or a pregnancy test. Please avoid taking over-the-counter antibiotics without consulting a physician.