Please upload fever profile that you have already done. That might give some idea what it could be.
If we are considering last event is related to current fever then, Look for other causes of fever. Like malaria, tuberculosis, brucellosis, rickettsial disease, intraabdominal causes ( hepatic abscess ) or viral causes etc etc....
If the previous event was totally not related to current symptoms, recently there is a raise in COVID cases especially in patients who were not completely vaccinated earlier.
Next Steps
feel free to consult me on practo for further evaluation and management