[ekr]

I've been (still am to a degree) in a very similar position. I also self-diagnosed myself with generalized anxiety.

I've starting working at a job about a year ago, a job that theoretically would be very close to what I would be doing in my spare time. And yet, I have the same problem, something is inhibiting my ability to focus, concentrate on problem solving, to provide solutions, and I'm fairly sure that thing is anxiety. I constantly feel very tired.

I don't really know what I could do, I've noticed that the problem tends to fade after exercising thoroughly (century mountain-bike ride or similar endeavors), but I'm still struggling with it on a day-to-day basis, and constantly think of quitting.

It certainly doesn't help that I'm also attending CS university, which doesn't leave me with enough time to fix my problems.

So you're definitely not alone in this.