Hi, you certainly got chronic sinusitis which has a more peculiar manner to be managed. I am afraid persistence of the pain might be an indication of other specific sinus X rays to exclude a sinus collection. Considering the fact you are on an atopic/asthmatic terrain, drugs like flixonase might have to be taken continuosly even up to two years at times. Antihistaminics, steroids and in case its a collection, a culture and sensitivity test to orient anti biotherapy might be useful. For the moment, you got to avoid any nasal congestion, use flixonase as prescribed and see your ENT specialist for a reevaluation. Delayed treatment could lead to spread of the germ, in case its a collection to near by structures like the brain and could cause meningitis, ethmoiditis which are serious. I would suggest you meet an ENT specialist for a reevaluation and discussion of an appropriate management plan, hope this helps, Luchuo, MD.