--the immediate thought I had might be that you could have a form of Central Pain Syndrome, which sometimes happens to people who have strokes, MS, or brain/spine injury due to accidents. What happens is that the spinothalamic pain tracts in the upper spinal cord, or the thalamus, which is a sensory relay station between brain and cord, is itself damaged, and these areas can no longer properly mediate pain sensations coming from the body. Often then one will suffer burning, shooting, electrical pain of a distinctly different character from "normal" nociceptive pain.

Take a look at www.centralpain.org to see if the descriptions sound like what you are experiencing.