You do sound depressed. It is awfully hard to get out of that spiral of neglecting things and, then, feeling more stressed and depressed. Depression gets to taking on a life of its own and it becomes self-perpetuating.

I've been dealing with a pattern somewhat like that, but not as severe as you describe. Even if you can just pick one thing to get done . . . and tell yourself that it is enough to just knock one thing off the to-do list each day.

Give yourself a ton of credit for even being able to keep at your job.