Ok I need some advise here. My 4 month old son has a little cold we just got back from vacation and for the past 2 days he has had a mucus cough and I can hear the boogies when her breaths lol. I called his dr and he said to run a vaporizer and let it run it's course. I know I don't have a vaporizer and can't get one right now so I can run the shower so it get hot in the bathroom so the steam will help him. I don't know how long this cold should last. I am scared of it turning into something else. His dr said just to keep an eye on him and have him drink as much as possible. Nothing is really changing besides him being cranky. Is their anything else I can do to help him? How do I know if it turns into something else like pneumonia? In case you haven't noticed I worry a tad bit too much lol. please no bashing I just need some advise.