Hello and welcome to HCM
The symptoms that you have described suggest that the sinus infection
has spread to nasal cavities, ears and throat as all these structures are interconnected.
You need to get a pus culture done in case there is pus discharge to know the organism causing the infection and suitable antibiotics against the organism.
Since, you are not responding to antibiotics, you need to change the antibiotic.
Thanks and take care
Dr Shailja P Wahal