Peanut Allergy or not?

Its a little hard to see the picture of Isaac's rash, but it came right after eatting a couple of peanuts. He came to me crying and gagging, and I thought it was because peanuts can be sharp, and he isn't used to that kind of food. Then he is making a little hack noise, and a deep cough. I panicked! His cousin Alexis has a peanut allergy, she gets anaphylaxis from peanuts, so we are normally really careful, but he has been fine eatting peanut contaminated food before. But the rash came so fast, I knew. And he was crying and having problems breathing. I made him drink some juice and he told me he was itchy, I made a million phone calls and finally called the poison control center, who told me to give him benadryl. I do not recommend you panic like I did. Call 911. Which is what I should have done, but, thank God, he was fine after the benadryl. Now we go see the the Doctor to get a referal to the allergist.