Greetings from India. From your detailed query, it appears that your child is not toxic, but still having prolonged recovery (as X-ray/blood tests are normal): reassuring fact is that he is active during afebrile periods.
Please review with your local Pediatrician, as sometimes there may be poor response to first line Antibiotic (like Amoxicillin), so on review pediatrician may upgrade to second line antibiotic (like CoAmoxyclav): if bacterial secondary infection is a possibility. Also limited new workup may be required, (especially
CRP/ESR)
Next Steps
Please raise the concerns of persistent fever with doctor.
Health Tips
Maintaining a temperature chart will be helpful to doctor's evaluation.Kawasaki has to be ruled out if fever is persistent.