Hello, Thanks for posting on HCM, I guess I would have to agree with your doctor on nutritional problem given that you have acid reflux and probably poor digestion of food taken. The most likely nutritional deficit is iron deficiency which could lead to anemia. The most common causes of recurrent lightheadness or dizziness could be: - Allergies. - Illnesses such as the flu or colds. Home treatment of your flu and cold symptoms usually will relieve lightheadedness (which you obviously do not have). - Vomiting, diarrhea, fevers, and other illnesses that cause dehydration. - Very deep or rapid breathing (hyperventilation). - Anxiety and stress. - The use of tobacco, alcohol, or illegal drugs. - bleeding/anemia (please check your stool if it is dark in color or get a stool test for occult blood in the laboratory). Sometimes bleeding is not obvious (occult bleeding). You may have small amounts of bleeding in your digestive tract over days or weeks without noticing the bleeding. When this happens, lightheadedness and fatigue may be the first noticeable symptoms that you are losing blood. Heavy menstrual bleeding also can cause this type of lightheadedness. I think your situation (given that you are getting worst) might require urgent medical attention. Hope this helps