Ma'am
If you are having continuous high grade fever then it needs to be investigated.
Eating oranges will not cause cough to start.
This is a lower respiratory tract infection , possibility of covid cannot be ruled out during this time.
Take paracetamol 650 mg for the fever , not more than thrice in day. But this is only symptomatic treatment, cause of fever has to be investigated
Next Steps
consult for further management