OK, anyone else get this?

I do tedious work and it's like pressure just builds up in my chest like I've had too much coffee or I'm too wired (not pain, nothing physical, just angst). If I keep plugging away at mindless figures I can actually get to the point where I can not type or move my mouse. Oh, nothing is wrong psycally, it's mental. I've no problem as long as things are chaotic and I'm fixing things but doing one thing over and over is like pulling teeth.

Heck is that???