There are lots of natural things that work wonders for colds, especially sore throats. My favourite is chicken broth. Works both by warming your throat and by being antibacterial. Even a stock cube in a mug of hot water will work. Camomile tea with lemon juice and lots of honey is a good one, too. Or just a spoonful of honey by itself every now and again if the pain is bad. A heat pack on your throat will also help it. For being stuffy, nothing beats running a hot shower and sitting in the bathroom for a while (also great for blocked noses in newborns). And I think you're allowed baby-vapour rub, which will soothe a cough if necessary.
