It's good that you've visited with your doctor about your symptoms. You do not have any eating disorders, but how is your appetite? Are you eating a proper amount of wholesome foods? Fruits, vegetables, whole grains, protein. Drinking enough water. Getting enough sleep. It would be best to eat wholesome foods and avoid protein shakes and Ensure, which are no substitute for solid food, along with sugary drinks of any kind. For snacks, have such things as: bananas, raisins, grapes, mixed nuts, mandarins or oranges. If this persists, you may want to see a different doctor for a second opinion.
Relax you just have a really high metabolism it’s fine
I probably should’ve read the entire text before commenting though