Is this an allergic reaction?

This hasn't happened to me very often but it mainly happens when I eat chinese food. My throat gets like scratchy and itchy, and i vomit. I've been allergic to all nuts all my life, but when i call the restaurants back, they say they use no nuts. I have on record foods that have caused it haha. When i ate an eggroll, egg foo young (i'm thinking its the sauce on top of it), and when my mom makes pea soup. Im thinking it's soy but i eat other things just fine with soy. Any suggestions what i could be allergic to or is this even an allergic reaction.