Baby allergies im scared.

So my son has an ear infection and I think allergies but God his nose is so runny and then stuffed up and the dried parts like cover his nostrils. I feel like he's not gonna be able to breath at night and it scares the hell out of me like he's gonna stop breathing. He's 13 months old. I gave him zurbies for cold and mucus 2 months+ but idk if it's even working. I can barley sleep just hearing him strain to breathe at night while he sleeps. I feel like it's gonna he the end of the world every time he gets sick and I get so scared. Can't take all the stress considering I'm almost 2 months pregnant with my second child... Need your help mommies!!!