Many of us deal with this. The thoughts of death need to be addressed if they are a problem.

Have you tried to simplify how you do your work ? I had to stop trying to use memory alone to do tasks. Multiple step tasks are the worst.

If you can describe the struggles you are having at work and the kind of tasks you need to do at work, maybe we can help you learn some work-arounds. Work-arounds can be lifesavers.