Hello. I had my first ever allergic reaction on Sunday evening. I got hives and my face swelled up. I went to the hospital and the put me on a drip and injected me with all types of things. I have been prescribed prednisone and something else for allergic reactions. I was told to only really start today (Tuesday). The hives have spread and weirdly, my hands and feet are in agony whenever I use them. I am struggling to walk at the moment. I have no more swelling. I am a little worried that I am experiencing these symptom so long after my initial reaction.