It often takes 48 to 72 hours to see improvement after starting an antibiotic like Augmentin DDS (amoxicillin/clavulanate). Additionally, a dry cough and mild fever can sometimes be caused by a viral illness, which antibiotics do not treat. For now, keep her comfortable, rested, and well-hydrated. Since it has been 48 hours without improvement, please contact her pediatrician. They can safely re-evaluate her to see if a different treatment is needed. Please seek immediate care if she develops any trouble breathing or a high fever.