Sorry for the delay, I'm currently training to be a teacher so I'm always really busy.
No I haven't had a GTT done. The doctor felt that as my fasting glucose levels were normal, I didn't need it - he said that the way my blood sugar levels dropped rapidly after eating say cereal, were normal. I have tested how quickly my sugar levels drop after eating cereal using a home glucose measuring thing and they drop very quickly, and combined with this, I get the dizzy/weak, shaky hands symptoms. I am due to see a neurologist next week, as recommended by my doctor.
I assume you are American? I'm British and in the UK, you need your family doctor to refer you to specialists - I can't just go and see an endocrinologist, I have to be referred to one. I'm hoping that the neurologist may be familar with hypoglycemia and then maybe I may get to the bottom of this.
My diet is currently low-gi and I'm a vegetarian. I don't eat white flour, cereal apart from oats, sugar, potatoes, parsnips or white rice. I don't drink any alcohol or caffeine. I have three meals and two snacks everyday. I make sure I have lots of vegetables and protein e.g. low fat cheese, eggs, beans, nuts, tofu. I eat fruit but I limit it to 2-3 portions a day, and obviously not all at once! If I have bread, I only have stoneground wholemeal bread and a maximum of one slice a day (most days I don't have bread). All my pasta is wholemeal and I only eat brown basmati rice. My snacks are usually a price of fruit and a handful of nuts or oatcakes with peanut butter or a wholemeal sesame seed ryvita cracker with cream cheese or homous and celery/carrot sticks.