B. Happy

Current stress at work mostly stems from the phrase "Don't worry".

It's used in the following situations:-

CDG - "Are we going to have these things built in time?"
anyone - "Don't worry"

CDG - "Have we ordered all the parts to make this thing?
anyone - "Don't worry"

CDG - "Am I going to end up having to do this thing that I've asked you to do, myself, at the last minute whilst I have a hundred and one other things to do?"
anyone - "Don't worry"

I think what bugs me is that worrying about things is a personal choice based on information available. And the simple phrase "Don't worry" gives away no useful information, which in itself is worrying.

So in the three examples previously give "Don't worry" is a negative answer to the question.

CDG - "Are we going to have these things built in time?"
anyone - "Don't worry (we don't know, we have no idea of even an estimate, therefore no we will not have these things built in time, you'd going to have to ask more specific questions and investigate. Time long it takes to build one, find out how many we have yet to build, do the sums)"

CDG - "Have we ordered all the parts to make this thing?
anyone - "Don't worry (no, we have only ordered some of the parts, but we're not sure which ones, we will only know when someone lays them out and counts them, this will happen halfway through making this thing, by which time it will be too late to order parts to get the thing made on time)"

CDG - "Am I going to end up having to do this thing that I've asked you to do, myself, at the last minute whilst I have a hundred and one other things to do?"
anyone - "Don't worry (no one is going to even try to do the thing you've asked, so you're going to have to do it yourself at the last minute)"

My new policy henceforth is that when someone replies "Don't worry" to any question, I'm going firstly worry, secondly do the damned thing myself and thirdly never ask the person to do anything again, thus rendering them redundant and keeping all the profits for myself.