My son aged 3years and 6 months is having acute pharyngitis since 11th November 2012, he has been prescribed augmentin 228mg to be given twice in 7.5ml + mucum syrup and zyrtec. His fever was persisting but yesterday and today he just got fever once that is 38C . is this normal as today will be his third day taking antibiotic. He has cough and lil stuffed nose as well.How long will the fever take to go.