What is your email address? I can tell you everything. I am having the exact same problem. I got my flu shot on 11/10/14 (administered by a nursing student at a health clinic), and I remember the shot going in higher on the arm than usual. I had normal localized pain for the first few days, then nothing until a month later, when I stated getting extremely painful stabbing, throbbing, pains in my arm at the site of the shot. I also developed pancreatitis around the same time, although, it is presumed to be unrelated. The pain is far worse in the evening and at night or when it is cold. Tylenol and a heating pad seems to be the best thing for relieving the pain for me.