I have a two year old with a rash that has raised bumps. The bumps look like bites and there are some bigger ones that look like blisters. I noticed it on his right leg when I changed his diaper 2 1/2 hours ago. It is speading over his body now and is on his feet, the other leg and bottom. Should I call the Dr. now or wait until morning. Also, what do you think the possibilities are that it could be? It is hot to the touch but no fever...his breathing is normal.