My son is almost 4yrs old. He is not eating food whenever I give him food he tries to vomit and the 2nd time he eats little. has been doing this for months. He doesn't have a vomit problem then I would have given vomited syrup. Only while having food he does this. we don't give that junk food also so that he have habit . I don't understand he able to chew then he vomit . offen i give his favourite that he eats. but now he don't want to chew jst he tried to remove it. what I should do