I need some advice on a sick baby!

(Note...Eamon is doing much better but I am always welcome to advice on how others treat their little ones when they are sick :)

Okay ladies, I need your advice. Eamon's little cold has turned from runny nose to now thick green runny and a robust cough, especially at night. Anyone have any ideas about what I can do to help him get over it quick. I forget what you are supposed to feed them? I am giving him Thymactiv which is an immune system booster (just started today), given to us by his natropath. I have started dissolving Aidan's vitamins in warm water and giving him vitamin water. Trying to keep the liquids in him and watering down his two milk bottles. I know that he's probably having a hard time because I have just stopped nursing him all the time (he only gets two feedings a day). But I guess their immune system has to have a work out at some point so I wont let myself feel too bad about it, I just feel bad for the poor little guy!