You are shaky because you don't want to eat, so try some easy and tasty foods you prefer, like chicken noodle soup, your fav cereal, toast with butter, cheese omelet, subway sandwich, cheese cake, and
a small glass of orange juice
some milk. Those are all tasty things, easy to digest, and will keep your strength up so you won't tremble so much, and they'll also tend to settle your stomach. Practice some deep breathing, it will help you relax.