Allergic Reaction

I've been getting shots for over 3 years now for my allergies. As time goes on I guess the dose they give me gets more concentrated. I've been having problems with one of my arms blowing up huge after my shots (the arm that the dust mite shot goes into). Yesterday about a half hour after my shot, we were home and my hands started itching. I had little bumps all over the palms of my hands and they were red and swollen. Then everything started itching. Both arms were itching like crazy and were red and swollen. I was hesitant to take a Benadryl because I knew I couldn't watch the kids very effectively. But I couldn't watch them at all if my throat swelled up and I stopped breathing so I went ahead and took one. In a half hour, everything stopped itching. I'm not quite sure if I should continue getting the shots, I think I may be too allergic to tolerate it? Anyway, I am thankful that the reaction wasn't worse and that God was gracious to protect me from my throat closing up. I guess I have some questions for the dr. now...