Is it a cold? please help

Erica

My 4 month old baby lost his voice 3 days ago where his cries are very raspy. He started snoring and even wheezing but only when he sleeps. He feels hot right now but temp says 98.6. Is this a cold? What should I Do? Do I use a humidifier? I looked online and apparently he's going to die on the Oregon trail lol... but really I'm getting a bit worried