Hi there. Welcome to Healthcaremagic and thanks for your question. Given that you have had all these tests and that the results have been negative, I would be quite happy to say that your problems are largely stress
related. You have a stressful job; trying to deal with people all day can be most annoying.
Look to your lifestyle for a solution. Take lots of exercise, eat healthy and consider quitting smoking
. If you can get a nicer job take it.
Andrew Rynne MD