give her fever reducers and lots of fluids it is probably just a stomach bug. if it doesn't get better within 4 to 5 days take her to her pediatrician
my 2 year old vomited once and has a fever. the fever was really high for a day but is down to 100 now. . she has been fussy but acts normal other than being a little clingly and eating less. she has not vomitted again. does she have an infection of some sort?