Oh boy, I get to add ANOTHER DD to my already growing laundry list! Spent 3 months with the BEST CFS specialist (Portland, OR)& learned I have ORTHOSTATIC INTOLERANCE which is connected to my recently diagnosed "POST TRAUMATIC FIBROMYALGIA" all relating to spinal cord injury as a result of car accidents. Do you find yourself having a hard time standing for any length of time? Are you more comfortable when you're laying down or in a prone position? You might not be crazy, but rather your body is inappropriately responding to your change in body positions. Because of this, activity, heat and high altitude can make it worse for you. Some of the symptoms are: postural lightheadedness, visula blurring, dizziness, excessive fatigue, cognitive impairment, gastrointestinal problems, nausea, weakness (most noticeable in the legs), mood swings, migraines & other headaches, noise & light sensitivity. That's just ORTHOSTATIC INTOLERANCE. There's more! It comes under the title: DYSAUTONOMIAS. For more info check out the "National Dysautonomia Research Foundation" @ www.ndrf.org. WHAT AN EYE OPENER!!! Hope this info helps someone else. It explained a lot for me! I'm going for my tilt-table test next month, which I think I'd rather have a spinal tap again! ANYONE ELSE FAMILIAR WITH "DYSAUTONOMIAS"????????? ...may the force be with you!