Hello, thanks for using health care magic. It is likely that you have chronic sinusitis. An individual is said to have chronic sinusitis when his or her symptoms ( nasal obstruction, purulent nasal discharge, fever, and sometimes headaches, bad breath and fatigue) persist for over 8 weeks. It has a variety of causes including viral and bacterial infections, allergies, poor nasal drainage due to polyps etc. Treatment of chronic sinusitis is aimed at reducing inflammation and as well as treating underlying cause. Antibiotics are indicated for bacterial chronic sinusitis which would account for chills or fever. However, the antibiotics should target the most probable germs and should be taking for a considerable time period. Corticosteroids such as nasonex and flonase greatly reduce the inflammation and favor drainage. You should get some corticosteroid ( for inhalation ) for use only for a few days at most a week, and some pain killers such as aspirin or paracetamol or ibuprofen (your doctor would give the posologies)and continue your antibiotics. If there is no improvement you should consider seeing an ENT specialist. Best regards and hope this helps you. Dr Achuo