Lightheaded, weak, cloudy thinking, shaky, nauseated and sweaty if i go longer than 2 hours between meals. all diabetes tests negative, what is it?

Endocrinologist: If you note these symptoms after having eaten certain carbohydrates, especially sweets, you may be experiencing reactive hypoglycemia which occurs when the blood sugar rises, the body secretes insulin to handle it, but the blood sugar drops too low bringing on typical symptoms of hypoglycemia. A 4 or 6 hour glucose tolerance test is helpful in diagnosis. An endocrinologist is best qualified to adv