Get some eucalyptus - most florists shops have it as it is considered "decorative and pretty" - and crumble it over a bowl of very hot water, them breathe the steam.

Drink tea with lemon and honey - anything with steam will help loosen chest congestion, but the eucalyptus is what the nurse at my college recommended when I was close to pneumonia all those years ago. She gave me some in a film canister - can you tell I went to Art School?