Nose block after viral. It due to viral?

So first my brother, mother got fever cough, then my 11.5 month 10 kg son.got cough and fever, then my dad got. i had sore throat and cold only n morning, so i hv not taken medicine. As one month back i had got viral and had taken antibiotics. For my sonWe got . Mucolite, paracetamol Fever went in two days. Cough with mucus became worse. So started ascoril ls, mucolite, Still mucus cough continued After one week we took xray showed mucus chest.gv  taxonim o, nebulizer, ab phylline syrup, Now 5 days course of it will be over. He doesn't cough much. Cant hear mucus in chest. But has nose block. I do nasal saline spray. Try to take mucus but doesn't come out. He doesn't allow to use nasal pump. Activity fine. Urine in diaper looks yellow, no of diaper less,eats well. 1. So 1 week 5 days over after he got symptoms. Should we meet dr again for nose block?? 2. Yesterday night i too got mucus in nose and throat, slight throat pain. What medicine i should get. Is it due to viral ??