Sick baby

My 15 month old son is so congested and also has a dry cough. We are currently in a hotel (on our way home tomorrow from vacation) and Monday I plan on taking him to the doctor but in the meantime, I’ve been sucking his nose, Vick’s, Benadryl (his doctor okayd it) and running a hot shower for a humidifier. Anything else? He is so miserable and can’t sleep.