well, I developed a kind of generalized anxiety - I think it came from the long hours in a fairly large and crowded open-floorplan office - it was just way more constant social contact than I'm comfortable with. I guess if it was stress, it was stress from trying to perform while conforming to an environment that I found profoundly uncomfortable. Also there were nebulous culture mismatches that made me feel like I had to put on a fake persona to fit in.

Now I work from home and I'm much happier.