Just curious what is "normal."

I gave LO one piece of bamba on Sunday, afterwards he developed a horrible rash all over his face/eyes/neck (which still looks awful). So of course I'm concerned that he has a peanut allergy, which can be quite serious. We are in a major urban area and our insurance refers to children's hospital for allergy testing, where there are literally dozens of pediatric allergists. But their earliest opening is mid-October, and they said they don't keep a cancellation wait list because they are such an oversubscribed specialty.