I also wish the problem were only external. I feel guilty when I try to keep good boundaries with others only to be a scattered mess inside my own head and not get anything done anyway. Feels like everyone loses then. All I can do is try to be faithful, but it seems like there could be a lot of opinions on just what that should look like.
Truth is, it's not that big of a deal at all. I think I just miss having my own office and being able to screen interruptions. And if that's one of my toughest problems at work, I'm sittin' in buttah.