L.W.
Techinally the FLU is not throwing up..its more cold like symptoms. She probably has a stomach bug. My daughter tested positive for the flue 2 weeks ago and never threw up. After the flu (last week) she got a GI bug that tore her bottom up with lots of diarrhea.
Stomach bug could be about 3 days...careful if she goes to daycare. Her Immune system is down and she could catch anything if its flying around. (mine did with that GI bug)