Hi, From the description you mentioned ,it seems to be chronic rhinitis probably allergic along with post nasal drip and acid reflux diseases. Sinusitis should also be ruled out in this condition.
Next Steps
Continue Allegra M for long time I mean at least 2-3 weeks regularly. Steam inhalation should also be done. Antigastric reflux medicines be continued.
you should use nasal saline drops and nasal azelastine
Health Tips
consult with ENT or pulmonologist