blood glucose control

What to do when blood glucose sores to high mostly, and sometimes to low - with a "ripping apart" feeling inside - 1 hour or 2 hours after a meal.  Doesn't matter what the dose of insulin is or carbs... ingested.  Nutritionist came up with a perfect meal plan - nothing seems to help, except for if no food is ingested the b/g stays fine.  Need food to live and maintain weight though. Had two gastric emptying test  One showed gastroparesis, and the other one a few weeks later showed NO gastroparesis. Tummy stays full even when not ingesting food.  Fiber was cut down, then increased back some to avoid severe constipation.  Out of control b/g has bad affect on the PDR NVE and future consequences.  Tried all sorts of suggestions from ENDOCRINOLOGISTS.  Something is terribly wrong - especially the severe ripping pain in feet & body... with b/g's going out of control.  Does anyone have another suggesting before blindness strikes!?  Thanks.