How old is your daughter? Give vomiting medicine and wait for 30minutes don't give anything in this period. If it's not helping there's are other ways of giving vomiting medicine like oral spray,oral strip's etc. You can consult your pediatrician for emergency to control it with injection. Cause of vomiting needs to look for any stomach infection, poisoning. Different age group patient has different causes for vomiting  .Best get her examine by your pediatrician.