Thanks for your query.
As mentioned by you your child is having respiratory symptoms which are mostly viral in nature .
Continue with paracetamol
4 to 6 hourly.
In case headace persist you can give combination of paracetamol and ibuprofen
Give steam inhalation.
Give plenty of fluids.
But in case symptoma persist after 48hours I suggest you to get him examined as physical examination will be required.
Hope this helps.