Hello,
I do not know nothing in that area, but really feel sory, sometimes when You kid is sick You feel that nobody cares about, and nobody dont look from Your side. I also had changed few pediatric offises, and now i see that every offiss has own system. Ask next check up what exactly to do in Emergencies, if it is possible to make a quick apointment, because my office also has no long hours, and I allways better go to emergency(Edwards Hospital there You can get help in 15 min almoust always), if they say waiting time is so much.
before my kid had no insurance, and we were going to cook county hospital(John Stroger's) and there really long waiting hours, even if you have an apointment.
I want to ask what kind of rash he has? Is it on all body, and is it small pimples or somethink similar to baby ilness, like varicela rubela mysles or other baby illness? My baby also had a rash on all body(even fingers and palms) like very small bites, I even have taken a picture. We went to emergency two times, but bouth times they said , because no side efects, and this rash is not conected with temperature, it is ok and jest said try give his benadryl, for iching and thats it. Even did not gave any medicine to put on skin. It was for full week, and finaly they started to disapier, and become brown dots, and in few days no more dots. from where it came i do not know, but my doughter did not get it from her brother. I was thinking that it might be conected to the baby shot he had 2 weeks before rash. So maybe your also got after shot? Can it be like reaction.
It Your baby has no fever, try to give him a bath as much as possible, and lavander lotion:D
Good luck. let me know how it all went:D