Thank you for your query on Healthcare Magic.
Your child seems having an episode of viral infection with bronchiolitis
which is the infection and inflammation of small airways.
Continue the medication as advised by your doctor.
The irritability may be due to fever
and due to less oxygenation so consult your Pediatrician
as early as possible for re evaluation of your child.
If there is any nose block, put saline nasal drops into each nostril
to make them clear.
And make the child comfortable by making him to sit on mother's lap.
If you find any danger signs like rapid breathing, bluish discoloration of hands and feet, lips, consult ER immediately.
Hope I have answered your query.