What can I do to make my little man.....?

feel better at night??? We just found out my 4 1/2 month old has pneumonia. As a matter of fact, we went to the hospital last night (Monday) and they did xray's. (Xrays were done at another hospital last friday and they did not say anything bad about them.) However, when the xray's were done last night they also got the records from the other hospital. This new hospital says that he has had pneumonia since Friday. I am over the fact that I was just sooo mad no one did anything to help us. However, how can I help him to sleep at night? We have him sleeping in his bouncer for the time being. The doctor told us this would help for the mucus to flow easier and him not to choak on it. We give him tylenol for his fever, and we use the nasal aspirator as well as saline drops as often as possible. I know his body needs to fight it off and he is on antibiotics starting today. It is just he wakes up in the middle of the night for about an hour screaming and coughing. Nothing seems to soothe that cough. He is coughing up mucus and just struggling to breathe. How can I help him???