My daughter has fifths disease. the symptoms started withrash on cheeks. two days later, she got fever/runny nose/rash on arms/legs. she has had fever for 5 days. normal?

Not 5 th disease : Her symptoms suggests some other viral illness, if she still has fever and the rash see the doctor. This could be some other viral illness

Scarlet fever: She should be seen by a doctor and have a throat culture to rule out scarlet fever.

Unusual-: Rash typically occurs when the fever goes away- it may be something else like a strept infection. Have it checked out by a doctor-.