Thanks for providing me opportunity to answer your question.
Based on the symptoms you've mentioned, it seems she has had an infection (most likely Virus) leading to respiratory tract
My advise would be:
1. To ensure she is able to talk enough fluids to prevent dehydration
2. Keep record of temperature
3. If there is fever, you can try anti-fever medicines like paracetamol
may take couple of days to recover
Temp of 37C is normal. Only when it is > 38C - it is considered fever.
Infants/toddlers having this sort of infection, usually start recovering from D5-7 of illess.
Dr Tejas Shah