I NEED TO KNOW WHAT IS GOING ON WITH MY 14 YEAR OLD SON FOR ABOUT 3 YEARS HE HAS BEE VOMITTING A TYPE OF FORM SUBSTANCE THE MAJORITY OF THE TIME, IT RENDERS HIM UNABLE TO MOVE OR SPEAK CLEARLY HIS STOMACH BECOMES HARD AND HIS HEART BEATS FAST DUE TO IT HE HOLDS HIS BREATH TO RESIST VOMITTING AND ALMOST IMMEDIATELY HE GOES TO SLEEP AS IF HE IS EXHAUSTED