I went through this; I took an entire year and change off. After a prolonged period of relationship and work stress, I simply had to step away. Any time I tried to do any sort of work, I'd seize, freeze-up, and become filled with an overwhelming sense of dread and hatred. So I did nothing for a very long time. Then, when I tried again, it was as you describe. I eventually got another job, one I enjoy, as money became a problem, and it took a few weeks, but eventually got into the swing of things again. I still struggle sometimes, but I take frequent single days off, and if I find myself dreading again or worrying about my performance, I remind myself that I can simply quit; it's a job, money doesn't have a strong causal relationship with happiness, and my needs are basic. The same goes for relationships. Unless either are giving you what you're putting in, quit. If you can't quit now, plan the exit. My goal now is to not get to where I was.