Discomfort Zone

I've slowly begun to realize that my constant strive for trying to push the edge of my world, to expand my horizons, and to step out of my comfort zone are actually becoming counterproductive. Instead, I'm starting to find it's making me uncomfortable with wherever I am, with whatever I'm dealing with, because it's outside my normal comfy little bubble. And that's just leading me to be rather unhappy all the time, particularly with work.

And that's a big problem.

I mean, I don't regret that I've had the chance to live in three different countries extensively and to get to know those areas pretty well and understand how each runs with different societal systems. It sure makes me appreciate the various aspects of the myriad regions. But with each stride into another unknown (to me) territory, I can't help but feel I'm getting further and further away from where I really want to be (and won't admit to myself), like I'm deviating more from what I imagine my life plan should be.

So the question is, do I continue to push this personal envelope until the manilla glue flap bursts? Or do I put a stamp on the corner, hide back in the envelope, and mail myself back to the cozy retreat of a life familiar to me?

Not really sure what the answer is.
And not even really sure how to find it.