My 3 almost 4 year old has been sick since Friday, vomiting , no fever , stomach cramps . At ER Monday with fluids, zofran in IV. Blood & urine work was normal, yesterday she acted great a few stomach cramps, not a great appetite but playing & happy. Was up most of the night with bad stomach cramps & vomiting yellow foam 4 times. Finally now sleeping, we thought yesterday this was over??