Im not on a diet,, 
i just eat pretty clean 200 carbs and 250 protein nowadays...3-4 cheats a weeks as im not dieting strictly.
At first it sounded pretty benign to me a common enough problem, but nothing to worry about. BUT the link I posted indicates otherwise. Slight variations lasting 30 minutes after eating are normal. But a feeling of cold accompanied by shivering, the body’s muscle spasms used to create heat, could be an indication of a more serious medical condition.
Common Causes
# Chills are the body’s natural response to a drop in temperature, which is usually accompanied by fever. Fever can be caused by a variety of infections like the common cold, influenza, or more serious conditions like pneumonia, urinary tract infections or meningitis.
Other Causes
# Chills after eating can also indicate hypothyroidism, a condition in which the thyroid gland does not produce enough thyroid hormone. The thyroid gland controls many of the body’s essential functions, including temperature regulation and metabolism. People with hypothyroidism are extremely sensitive to variations in temperature and particularly intolerant to cold. Other symptoms of include weight gain, low energy, depression, hair loss, brittle hair and nails. It is diagnosed with a simple blood test and easy to treat with medication, but if left untreated can lead to body system failures or even death.
People compromised by diabetes, malnutrition, anorexia, anemia or immune deficiencies like lupus and AIDS may also experience dramatic chills after eating.
