What Causes Explosive Diarrhea And Cramps?

Okay I have a puzzle for you to solve ... when I was a kid I was in a major auto accident that resulted in blunt force trauma to the abdomen. From what I have been told it done severe internal damage .. bile duct was severed and lacerations to my liver along with Damage to the small bowel .. 3 years later went through a bowel resection due to gall stone blockage and them having to re extend small bowel .. I cannot handle sugars , carbohydrates, pastas potatoes, milk, some fruit , bowel issues with explosive diarrhea and cramps if the above are eaten , constipation if sunflower seeds are eaten among other fiber foods ... have reactive hypoglycemia to where I can t seem to function when I take in carbs or sugar but blood sugar is 106 normal range 2 hours after eating .. very frustrated