Hi, welcome to HCM. Can understand your concerns. 
Fever for 3 days with episode of nose bleed can occur in Upper 
respiratory tract infection, sinusitis, 
pharyngitis or lower respiratory tract infection. 
- In upper respiratory tract infection, fever is present and cough is also present. History of throat pain can be present. 
- In sinusitis, fever is present and headache is also present. 
- In pharyngitis, fever and throat pain is present. 
- In lower respiratory tract infection, fever, cough and chest congestion is present. 
Kindly do 
complete blood count, CRP levels and X ray chest. 
An examination by 
ENT specialist doctor should be done so that we may not miss any important finding. 
Continue 
paracetamol syrup for fever in dose of 15 mg /kg per dose orally. 
Review back with above reports. 
I hope this will help you. Wishing your child good health. Take care.