I'm having numerous problems that seem to be in a "grey-area" between physical and mental. I'm a relatively healthy, happy individual who has been experiencing bouts of muscle weakness, fatigue, and now pain and burning from elbow to fingertips. On top of that, I feel a weight on my chest. Nothing I can't live with, but I just feel as if the air around me is a little thicker and harder to breathe, if that makes sense. Yet for all that, what's really bothering me is what seems to be repeated losses of cognitive function. I'll be going along fine, next thing I know I'm completely disoriented and I can't remember what I've been saying. Sometimes I'm at my desk and things look completely strange. Like, I KNOW it's a stapler, but it doesn't seem connected to me or my desk. Or I look at my husband, and I think "This isn't right, why am in this car with this guy?" Is this a medical condition, or am I losing my mind? My doctor has run EEG's, MRI's and CAT scans, all normal. I'm starting to fear that I'm just crazy. And I'm frightened, because these episodes are happening more frequently, to the point where I can't perform my job and have been placed on performance warning. Are there other tests that could help me find a diagnosis? Is it possible to have a legitimate medical condition yet negative test results? Sorry for the loooong post....