Paulette:
Thank you, and thank you also for asking another question about which I can be reassuring. In the context of fever and a child who also had fever, your rash is almost certainly viral. Some people get a rash with a virus and others don't. It doesn't matter which virus, since it obviously isn't one of the "namedA" ones you list. If it doesn't itch, there's nothing you need to do. It should go away in 2-4 days. In the unlikely event it doesn't, show a doctor, though I doubt you'll need to.
Happy New Year.
Dr. Rockoff
apparently this rash is not some thing only your family is experiancing, one of the girls I work with had it and was hospitalised for two weeks they ran every test they could think of and still can't find the cause. My children and husband now have some sort of rash it seems to be contagious?