baby is congested

Alejandra
My baby is congested, it sounds like he can barley breath. I bought little remedies saline spray I've been trying to get everything out but it doesn't seem to work if anything it's made it worse I think. He threw up some flem buts it's still in there. I asked his pediatrician if she can take it out and she told me to by the saline spray and do it at home 😒 also tried the steam bathroom for 10 minutes didn't really work. Does anyone have any suggestions?