Hello, You are suffering from digestive problems, you are on HCG diet and presently your stomach is cramping. You are having pain due to acidity or gastric reflux. You can take antacids or PPIs, for relief. Take sips of water throughout the day to stay comfortable. Stay at rest. HCG diet sometimes causes constipation due to diet changes. Abstaining from food for short periods may lead to serious hunger problems. HCG diet requires severe calorie restriction due to which some people may experience not just hunger, but also unpleasant side effects like headaches, brain, fog, fatigue, and dizziness. Not getting enough daily calories for an extended period of time can lead to an intense state of hunger and thus the symptoms that you are experiencing. It can lead to a habit of binge eating or get caught in a loop of disordered eating. Since you have digestive problems, it will be better that you don t go for HCG diet control. You can go for normal fasting schedules and regular walking, doing exercises and eating a balanced, healthy diet. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician