My 4 year old daughter has a slight case of pneumonia and her fever now ranges between 99-100. Is this normal? It used to be between 102-104.

Fever. Typically after 48 hours of antibiotics doctors like to see temperatures below 100.4, if not we need to re-evaluate the treatment and diagnosis. 99-100 is acceptable, but also be looking at her other symptoms.... Her respiratory rate, her energy level, her cough, if those are not improving that is cause for re eval as well.