Cass, I've had every symptom you've listed, just not all at once. I've been told I have conversion disorder. After a year and a half of these symptoms, if it were anything horrible, you'd have very real deficits. Which you do not. If you expect this to get any better, you must let go of the fears attached to it. With the very slow passage of my ALS fear even my twitching is down remarkably. I still have periods when my legs flip out on me, but I'm pretty confident that the twitching will stop eventually. Believe you're healthy and you'll quickly notice becoming healthy.