i am going through the same exact thing. It could be stress. I have had so many tests and eveyrthign has come back normal, so the Drs came the the verdict that its caused by stress. This has been going on for THREE YEARS now. It's nice to know that I'm not alone.

Lately, I have been nauseated constantly. I am going through a very stressful emotional time. My father was incredibly ill for a few months and died in February of cancer, but could this seriously be the cause of constant nausea? It is really distracting. I am also exhausted and have been sleeping much more than usual, and wanting to take naps on the weekend when normally I wouldn't. When I lie down, I have trouble getting up again and can sleep for three or more hours at a time.