Sorr to hear that Isaac is sick... It's horrible when they are sick... My little one is sick at the moment as well. Had the flu which has turned into a chest and ear infection (well early signs of)

Making a bathroom steam up and sit in there for a couple of mins (not long as you don't want them to get over heated) helps with coughing/bringing up phelgm. Some baby balsm on his chest/feet (as long as he's not walking and going to slip)

The thing you would have to look for is that the fluid isn't going onto his chest... watch for wheezing, loud breathing, rattle, vibrations when he breaths that kind of thing... Also watch him to see if he's pulling at the ears...

Otherwise the best thing for them is loads of cuddles, keep his fluids up, and keep him warm. :-) Hope your little man feels better soon!