Hi,
I understand the obsessive thought patterns that you are talking about. When I first stopped drinking I was consumed by negative obsessive thoughts. Eventually, someone here recommended journalling to me. Try writing down your thoughts when they come into your mind. For me, it helped me to let go of them. Another thing I learned was, if you stop the thought quickly when it enters your mind, you can prevent from 'taking over' your thinking. I tried to be vigilant about that.
Do what you can each day about the job situation and other parts of your life and then try to let go of those issues.
You might find help if you read around here and you might check out our Anxiety Disorders forum.