I think everyone is right about suggesting that you see your psychiatrist. Stress can really do all kinds of things to us, including insomnia, nausea, pain, etc.

Do you eat foods with gluten at all since you appear to have symptoms of Celiac illness? You might wish to have a doctor do some testing to find out if you do have
that condition. If so, you need to remove grains from your diet completely. It will only get worse over time unless you eliminate grains when Celiac disease is present.

I hope you find the answer soon and that your boss quiets down a good bit.

Take care.