Raising a baby with food allergies

This week, S went in for his 1 year check up! Can you believe it?? Over the past year, we have discovered that he had several food allergies as he was introduced to new foods. He was put on an egg free diet after he tried eggs at 9 months old and broke out in a rash all over his face and neck. Since other allergies tend to go hand in hand with egg allergies, he was also put on a peanut and fish free diet.
When he was around 10 months old, I wanted to start introducing milk into his formula during meals so we could start weaning him off of formula by his first birthday. The first night I gave him milk (1 T. mixed into 4 oz. of formula) he had a horrible reaction and I felt like a terrible Momma! His poor little tummy was rock hard with gas and he cried nonstop for 5 hours. Yes, you read that right...5. hours. straight.
I followed recommendations that say if your child has a reaction, wait 2 weeks then try again. Two weeks later, he had the same reaction again. This time, however, he also broke out in a diaper rash that got so bad, it became raw and bloody. That rash took 4 days to clear up. At this point, I took him totally off of dairy products because I suspected other dairy might also be bothering him. We cut out cheese, yogurt and cottage cheese. He was still on regular formula though.
I started tracking his reactions, what he ate and if he had any problems. He did continue to have loose stools (sorry if TMI!). So finally, his 12 month checkup came around and I presented his doctor with what I had discovered. She agreed and put him on soy milk. He was also sent for allergy testing where they tested him for over 30 foods. We are still unfortunately waiting to hear back about his bloodwork, but at least we will know conclusively if he is allergic to the peanuts and fish (which he has never had any of yet)
The last three days have been spent doing research, consulting with other Mommas who have children with allergies, reading blogs, finding new recipes, and writing up his allergy plan for family members (his pediatrician told me that 9 times out of 10, an allergen will be introduced to a child by a grandparent who doesn't believe the allergy is a "big deal")!!! Three days in, and my head is swimming. What if he does have a peanut allergy? What if he's not just lactose intolerant, he's got a milk allergy too? (they are two different things!) Have you ever read a food label? Milk and nuts and eggs are in EVERYTHING! So I spend a large part of the day worrying about my sweet little boy and how he'll react to new foods...it's stressful, and I'm sure I earned new gray hairs and new wrinkles!
Hopefully tomorrow we'll have the answers we need and I'll have a better idea of what he needs to have cut out of his diet. Until then, we'll continue the soy milk (which we've seen big results from already!) and keep reading labels!