I have gone through your query.
Better to try the steroid
systemic as well as nasal.
With this you also add in your treatment-
1. Steam Inhalation about 5 times a day
2. Nasal decongestant
3. Systemic decongestant
4. Chew gum contain xylitol
5. Proper antibiotic
For better diagnosis and management consult your ENT specialist
Wish you good health