Hello, Your symptoms are indicative of Celiac disease. The diet you are taking is not suiting you. You are under fed, under nourished and also dehydrated. Thus you are having fatigue and headache. You are suggested to get repeat diagnostic (Endoscopy, serology) tests done to assess the inflammation and damage done to your small intestine. Get clinically examined by a GP, sometimes IBS, is confused with Celiac disease. If you have Celiac disease, the ability of the small intestine to absorb essential nutrients gets reduced and this causes complications (malnutrition, irritability and depression, etc) later and generalized weakness. If your small intestine is much damaged the doctor may treat you with injections & intravenous fluids. You are suggested to consult a nutritionist for a better diet charting. In the meantime, you can take rice (cooked well in water), rice in its natural form is glutein free. First you can start with small grain pudding rice cooked well in water, take small amounts. If you are able to digest & feel better, increase the amount slowly. With rice you can take eggs( boiled eggs, poached eggs, and fried eggs made in a clean pan—are gluten-free), potatoes, vegetables. If you are fine add lentils, beans and herbs. You can even take long grain rice if you feel better. Take small amounts multiple times a day. Avoid eating anything under-cooked or raw. Cut on addictions if any. Get treated at the earliest. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician