stomach bug?

[AUSTIN431]

MY DAUGHTER IS 4 SHE STARTED SCHOOL 3 WEEKS AGO .2 DAYS AFTER SHE GOT A STOMACH BUG AFTER 3 DAYS WE THOUGHT THAT SHE WAS BETTER BUT EVERY NIGHT SHE WAKES UP THROWING UP UNLESS SHES EATEN NOTHING AND ONLY HAD WATER IS IT NORMAL FOR A STOMACH BUG TO LAST THIS LONG?

[AUSTIN431]

WE HAVE TAKEN HER TO THE ER AND TO HER PEDIATRICIAN AND THEY KEEP TELLING US NOTHING IS WRONG TO WAIT IT OUT BUT ITS BEEN ALMOST A MONTH AND SHE ONLY EATING CRACKERS AND WATER OR  EATING REGULAR FOOD AND THROWING UP AND HAVING HORRIBLE BOWEL MOVEMENTS. THE PEDIATRICIAN TOOK STOOL SAMPLES AND SAID NOTHING WRONG BUT KEEP HER OFF REAL FOOD AND DRINKS I'M GETTING VERY WORRIED SHES LOST WEIGHT ,SHES SICK ALL THE TIME ,SHE CANT EAT AND TO ME THE DOCTORS DON'T SEEM WORRIED ENOUGH I DON'T KNOW WHAT TO DO TO HELP HER SO IF ANYONE HAS ANY ADVICE I WOULD BE VERY GRATEFUL