When I was young, apparently this meant I had ADHD (Throwing this in as a snide comment to expose my opinion of how my primary schooling treated this symptom in children EDIT: I see in a side comment you were concerned about undiagnosed ADD, I'll admit I'm somewhat concerned with _overdiagnosing_ ADD. The medicines I was given gave me ticks that took decades for me to get rid of and altered my mental state in terrible ways, and it meant that instead of inspecting WHY I felt this way, I simply got shoved chock full of pills and then booted/put with other misfits, which just made the focus problem worse. The joke I used to make as a kid was that I only had an attention deficit for things that didn't matter).
I took issue with that, largely because I find the response to be eminently logical, and built coping mechanisms to let me succeed in spite of it, but the underlying driver is still there.
I realize this is such an insubstantive comment, but it's a topic I've tossed around in my head for many many years now, and often haunts me with a "why do you feel such fundamental friction with doing your job like every other professional adult" and hearing others express the same root is somewhat reassuring.
(I realize this is tangential, but if you're _at all_ a hip hop/poem fan, check out 9-5ers Anthem by Aesop Rock. this is one of my "at work coping mechanisms" when I feel this way.)