Most important is to keep your baby hydrated. If oral intake is poor due to vomiting then she needs to be started on an antiemetic. She needs to be given plenty of oral fluids. Most diarrhea in this age is viral un origin and subsides on its own.
Next Steps
contact a pediatrician.
Health Tips
Please refer immediately if she has reduced urine output, sunken eyeballs, excessive irritability or altered senses