Croup and an ear infection

So Monday night my little guy was acting kinda off, then woke up about 3am with a fever, vomiting and kept braking out into coughing fits. Today we went to the doctor and found out he has croup and an ear infection:( He was given a steroid and antibiotic. But has anyone else had a little one with croup? I’ve been rubbing vapor rub on him and the humidifier going but he’s still having a hard time breathing, anyone know anything else that can help?