She needs hospitalization as soon as possible, asshe is frequently having vomiting
. She needs iv fluid to maintain rehydration. With good supportive are in hospital she will come out from vomiting and fever
. The diarrhoeal episode can also be due to the antibiotics as some of the antibiotics are prone to cause diarrhoea.
Please don't get panic. Take her to nearby hospital and follow the instruction.
All the best.