Both my kids, ages DS 3 yrs old and DD 11 months old, have runny noses and bad coughs. My 3 yr old had a low fever last nite that broke late last nite. I got the vaporizer out and running while my DD takes a nap..should i be using a vaporizer? I was debating whether or not to take them to doctor but decided not to since i'm sure they say it just needs to run its course.