I also sometimes feel like I have an immense amount of pent up energy, but not the energy to burn it (i know that doesn't make sense, but it's the best way to describe it.)
I try listen to music to distract me, and try do very mundane work things. I tend to be VERY quick to anger. Please try explain what it is you are feeling. It will be good for you to get it on paper, and maybe we go through the same.

Hang in there, and keep visiting PC - it helps keep me grounded!