I think you are having Severe sinus infection
.You didn't mention whether X ray
PNS/CT PNS was done or not.
As per literature,Medicines have to be used for 2 weeks initially.As you are taking drug since 5 days,you have to take for another 9 days.
Another important point is that Amoxycillin
alone will not be sufficient.It should be combined with another Broad spectrum antibiotic.Please consult your local doctor for addition of another Antibiotic.
If the symptoms are not relieved even after 14 days,Surgical procedure has to be attempted.Please contact your ENT(Ear Nose Throat) doctor for treatment.