IM 45 HAVE BEEN SICK FOR 5 DAYS ,BUT NOT WITH FLU,BEEN VOMITING,NAUSEA,STOMACH PAINS,WIEGHT LOSE,UNEXPLAIN BRUISING,CHEST PAINS(MAYBE HEART BURN BUT ISNT)THIS ALL COMES AND GOES THREW OUT THE DAY,ILL BE FINE THEN NEXT I START FEELING SICK,HAVE TAKEN STUFF TO STOP THE VOMITING AND IT WORKED AT FIRST NOW DOESNT,NOT HUNGRY,CANT SLEEP.IVE TAKEN EVERYTHING FOR HEART BURN ,VOMITING,AND NOTHEN WORKS ,NOW I HAVE BLACK POOP,WHAT CAN THIS BE I HAVE,