I'm so sorry to hear about your DS's reaction Keresley 
. DS had a reaction to peanuts and although I was expecting him, after the reaction, to be allergic to them I never imagined that the tests would show that he was also so allergic to milk, fish, soya and egg. And I was angry too, because DS was just looking as if he had outgrow eczema, and just in the same week when DS was tested he had his first serious asthma attack.
The day I learned that DS was allergic to nuts, soya, milk, fish and egg I couldn't understand how things could have gone that bad, I cried for a few hours wondering how I could bring up safely a child with so many allergies, and just wanting to be able to feed him something knowing that he was going to be OK. That day somebody told me that the day you get the bad news is actually the worst one, and it was true, soon you will find ways to avoid foods and situations that put your child at risk, and as others have said, it will become second nature.
When you get the diagnosis, it is easy to focus in the worse: your child is allergic and you have to be extremely careful. However, it is easier to forget that your child is actually going to improve once you take more precautions. DS is sooo diferent (for the better) since he is in a restricted diet that I can say that all the worries and extra work are worth it. You may find that once you start removing other peanut related things from his diet other "additional" problems tend to disapear. So don't dispair, if we can teach our children not to drink bleach we can also teach them to avoid certain foods. Being in a restricted diet takes the same work as if you have suddenly decided to become vegan/vegetarian/etc. you will need to adapt the diet of your family but once you get into it you will see that things are not that difficult anymore.
So, in the mean time, a huge hug and any questions, please just ask.