thanks for your query.Post nasal drip
is very important sign for chronic rhinosinusitis
, and also you had h/o allergy
too, in favors of chronic Rhinosinusitis.
Continue nasal spray
, Also add anti histaminics anti allergen Like fexofenadin +montelukast
Take steam inhalation before sleeping
Avoid allergens Like dust, fumes, pollution, smoke etc
Thanks, take care.