Hi Avoid junk foods,add extra calories to your diet,have 4 to 5 meals rather than large 3...since you are diabetic avoid carbohydrates add protein rich foods and healthy fats to diet for e.g..egg white...add fibre rich foods like green leafy veggies,carrots,Apple, etc....do regular exercise without failure......consult dietitian for further details...consult physicians for headache and pain abdomen