Can anyone help me to know why my body will not accept or metabolize any sugar or carbohydrate whatsoever? I am only able to eat lettuce, chicken, fish, eggs, and water. If I have anything like rice, or even a green bean, I get alot of pain in my stomach, tachycardia, swelling in my head with throbbing pain, sinus congestion, nervousness, anxiety, and even a change in personality. I've tried taking digestive enzymes, and it helped with the bloating, and severe flatulence, but all the other symptoms I just listed above still occur. I'm very weak and hungry and tired of eating only meat and lettuce. I'm also worried that I'm not getting any calories or glucose for my brain and heart.
I can't even have a salad with tomatoes and cucumbers because they have sugar in them. I was so hungry one day that I had about 1 oz of orange juice and it was like I had swallowed poison. I went to a gastroenterologist and he is ordering lab work, a sonogram, and possible endoscopy, but offered no help about what I could eat. Any clues?