The calories we take in through eating and also drinking would be equal to the calories we use through physical activity and our body's other energy needs to function.
Each person has a different metabilism and diet
Your stomach will get smaller and therefore it will take less food to make you feel full.
The facility that is most cost-effective would be a local doctor at a primary health care center
Good Luck! Get Good Rest and Eat Something High In Carbohydrates To keep you going!