Hi, first of all go for a head and neck X ray in caldwel luc view and water s view to rule out other pathology of sparanasal sinuses like polyp, mucocele or chronic sinusitis, then meet an ENT specialist to have a through examination including rhinoscopy to assess your condition .let them diagnose the type of rhinitis you have , go for complete pannel allergen test to get the list of all substances which are allergic to you, also go for pulmonary function test . proper se of levocetrizine , montelukast , oral or topical steroids and antibiotics can manage your symptoms perfectly for which you should follow your ENT specialist. take care.