Hi Kate

Sorry, cold and flu tablets are no good for bfing mothers. The ingredients used to dry up the mucus can also affect bm supply (it's another bodily fluid). The same goes for many herbal remedies for cold and flu, with the exception of things like vitamin C and (I think) echinacea.

You can try using a vaporiser with a eucalyptus-based oil or similar in your room while you sleep, something like that on a tissue. Plenty of fluids and rest is about the only other thing that can help you.