Hi, My Son Is 11 And Half Years Old. Since

hi, my son is 11 and half years old. since few days he is having loose stools with foam like type. at night after eating he takes out cough and sometimes vomits too. some times he passes stool twice n sometimes four to five times and that too loose. Now a days to does'nt feel hungry n does not eat properly. since last two days i m giving him imodium table.