Lately i have waken up in the mid night feeling cold and clammy and sometimes even shaky and i feel like i might throw up but i don't why is is?

May be hypoglycemia: The symptoms you describe can occur from low blood sugar. You are at increased risk for this problem if you are not eating enough calories/protein or if you are on meds for diabetes. Try to eat a protein-rich snack (milk, cheese, yogurt, lean meats) prior to bed to see if it helps. Symptoms could also be caused by low blood pressure or an irregular or fast/slow heart beat. See MD if persists.