Hmmm... What you speak of here is what I would call 'staying centered.' This is actually a skill, and it is born of a deep belief in one's own ability to cope, adapt, influence, and manage their circumstances.
The polar opposite, panic, is equally rooted in the other extreme. A core belief that there is no escape, no ability to control events unfolding around them. Thrashing around, I would call it. lol
So, despite your stress and obsessing over your projects, what I take from your comments is that you really are comfortable with your ability to overcome almost any situation. That confidence, or at least that comfort in ambiguity, is what may be fueling your centeredness.
Whatever it may be, it is a good thing.
Thanks for the encouraging message!