Scariest night of my life..

Woke up at 12am this morning to my baby barely being able to breathe. He was wheezing and coughing and sounded awful. We rushed him to the emergency room and they told us he has croup. I don’t even know how he got it because he hasn’t been sick. I’ve literally had 0 sleep in the last 24 hours. We’re all so miserable. Has anyone’s baby dealt with croup before? Any tips on how to help him? Please say a prayer for my baby boy 😔