What Causes Itchy Throat And Swelling Under Ear In Cold Temperature?

I started to have a metallic taste in my mouth about three weeks ago. About a week later I began to experience an itchy throat and feeling like my throat was closing/ hard to swallow and feeling pressure in my left ear. About a week later it looked as if my jaw was swollen on the left side, my neck was sore and felt stiff and I could feel a lump on the left side right below my ear. When I yawn or open my mouth to wide it would hurt and also if I put my head back it hurts. My ear seems as if it is sensitive to cold weather because if if air hits it I feel the pressure and it goes down if I put a warm compress on it. When I chew gum or after I eat it also will swell and it goes down after a warm compress is placed on it. I went to the doctor a week ago and was given a steroid and antibiotics and the lump under my ear went down but it seems as if I was having an allergic reaction to one of the medications because I started itching. By the way the Dr. Said my left ear was really red and it looks as if bubbles were in it and the right had some redness but not as much as the left. Why am I still experiencing this swelling under my ear and itchy throat under certain conditions?