My body is physically hungry, but i am repulsed by eating. what do i do? this began yesterday, and i dont know how to fix this. i am very worried?

Worth having visit & check-up with primary health care provider then consult psychiatrist or psychologist

Need more information. Unless you are throwing up, you should eat and drink enough to avoid weight loss and dehydration. If the symptoms last more than a couple of days, it would be prudent to see a doctor. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Wish you good health.