Thank you for your query,
Continue the medication as prescribed by your Pediatrician
Try to give oral fluids and soft infant diet to maintain his hydration and nutrition.
If there are loose stools probiotic
or sacharomyces can be given orally after your doctor prescription.
If the fever
is not decreasing inspite of 48 to 72 hours of antibiotic, revisit your doctor for the assessment and medication.
Hope I have answered your query.