I have just got over a chest infection which I've had for 16 days. I went to the doctor and she advised to stay in the warm, inhale steam 4-5 times a day and take paracetamol.
It was a pain having to inhale steam so often, but it worked! I just boiled the kettle, poured the water in a bowl and put my head over it with a towel. Was quite relaxing!
U can take robatussin or try hot tea with some honey
I just suffered through it with lots of hot showers and a vicks vaporizer. Musinex refular is something you can take if the congestion is in your head as well.