"Block"

So there's the term "Writers' block"... To explain that awful feeling of complete imagination emptiness that befalls a writer who's mind switches off. The term can even also be amended for musicians, who may also be uninspired when penning a symphony.
But what about me?
I'm not a writer, which ironically is why I am unable to articulate just how far away I am from musician status.

I'm a father of three (3, 4 and 14... Odd names for children I know!!!), I'm an IT manager, a self-professed nerd... A normal person!

So what term can I use, to help explain that thing that my mind does... when I am trying to concentrate on a little bit of work... or failing to keep engaged when chatting to the wife?

It's not so much of a block, it's more of an overload... How can I be expected to work, when something completely trivial is at the forefront of my mind?
How can I be expected to make notes about the obvious important things my wife is dribbling on about, if I'm already trying to remember what rhubarb tastes like, whilst simultaneously counting to 100 in Welsh?

It could be attention deficit disorder, it could be sub-conscience procrastination... Or it could just be I'm a normal bloke...[My mind just wandered for a good 5 minutes, wondering when the last time I saw an episode of f.r.i.e.n.d.s was!] Until I'm able to do enough research, with maybe a blind study to back up results I'll probably just keep ignoring it??