I injured my arm while falling backwards and am not sure what I hit it on. Immediately about a 4 inch lump appeared. Shortly after that the forearm became black, blue, red, and later yellow. Now, a month later I have an inch and a half raised lump on the forearm, and it is black and sometimes red. Will it go away? Dr. did xray - not fractured. Do I need to do anything else after using ice?