Hello,
According to your history you have allergic rhinitis.... The medicines given for which including the nasal sprays, only give symptomatic relief but that relief lasts only when medicine is taken....
Next Steps
you would require a nasal endoscopy to rule out sinus problems and a skin prick test for respiratory allergy which can findout the root cause of your problem...
Health Tips
in the meantime do vaccuming of your bedsheets and matress at least 3 times a week...