Oh Allergy

Baby Boy is having a bit of trouble with some food allergies.  It's easy and hard to try and figure out what he is allergic to while nursing.  Easy because I can control everything that goes into my body, but hard because it feels like a crap shoot.  Is it one thing, or a combination?  If I have one of something and not of another is there a reaction?  And then I just feel horrible for him while having to suffer through the experimentation.  I'm really hoping to talk to an allergist soon.  I know he is only 6 months, but each reaction just seems to be getting worse, and if I could just have a more precise point of reference...

He was SO broken out in a rash today and it flared up every time I nursed him - thankfully the Benedryl kept it under control (no wheezing or breathing issues).  In the past, I've been able to do a little bit of dairy and have it just result in him being very cramped, and I've also been able to eat peanuts, but I ate a bit of both yesterday and this morning I had peanuts and that is the only thing I can think of that would have caused such a horrible rash reaction.  Like I said, this whole experiment thing is a bit daunting.  So I'm crossing my fingers that an allergist will see him even if he is so young...