Thank you for posting your query.
The most common cause of fever in this case could be viral fever. However, as one week is approaching, we should consider other infections such as typhoid, urinary tract infection
, respiratory tract
A blood culture
would be useful. A course of empiral antibiotics may be necessary (in addition to amoxillin, as it has not helped).
Please discuss these with your pediatrician
Dr Sudhir Kumar MD DM