Topical nasal steroidal sprays are the first line and most effective mode of treatment for such symptoms all over the world even in Uk and USA.
Obviously there is a strict criteria to diagnose allergic rhinitis but looking at your symptoms so far ,you need medications
Next Steps
Flomist nasal spray 1-2 puffs each nostril for 4 weeks
Otrivin nasal drops for 1 week
Tab Allegra for 1 tab for 2 weeks
If severe enough :allergy immune testing ,serum IgE and serum eosinophils
Health Tips
Avoid too much exposure to dust and allergens
Try to find what in your surroundings could be the cause for these symptoms