Hiya Tiggs,
Happy New Year to you and all the family, sweetheart. :0)
Sorry to hear about little tiggs, but colds are plentiful at this time. I would just keep giving him Calpol/Ibuprofen if he has a slight temperature and see if that kicks in and helps. If he continues to be troubled and cough gets worse, would'nt hurt to get his chest looked at by your GP or nurse, so would make an appoimtment or ring your surgery for advice by keeping them informed of his symptoms.
Hope he gets better soon. x