mmr vaccine

Hi,
I just moved to New jersey from California. I have been trying to locate a Pediatrician in my area. During this search the Pediatricians told me that no physician would take my son as a patient if he doesn't get he rest of his vaccines. He is 2 years old and we only gave him what my Pediatrician in California said was the most necessary of the vaccines: Hib, Pertussis and Prevnar. Well during this visit at the New Jersey Peds office I felt pushed into giving my son the MMR,Chicken pox, and Polio..
He now has a rash all over his body and a fever. I am so very worried and I regret that I gave him these vaccines, particulary all at once, which is what the Pediatrician suggested...

Worried...