Nasal block for 14 months kid. Odisha!

Hello Doctor. My son of age 1.2 years has some inflammation inside his nose linings which are blocking his air passage due to be feels difficulty in sleeping night. Due to blocked nasal passage majority of times takes air from his mouth. This is happening since 8-10 days. Also, he is having cold. We are suspecting this happened due to viral infection from me and my wife's cold since 7 days. We have tried many medications like Ascoril flu(phenylephrine hydrochloride and chlorpheniramine maleate drops) , Macbery Junior(Levosalbutamol sulphate, Ambroxol hydrochloride and Guaiphenesin Expectorant) , Solvin nasal drop and Nose vision mini nasal drop. It's his 4 days medication till now. But no sign of improvement. We are quite worry seeing that inflammation inside his nose blocking majority area of breathing through his nose. Also, browsing through internet about things like inferior tuberinates, nasal polyps scaring us significantly. Please help us answering. We are from Sambalpur, Odisha