Hi Zeta,
Pooh beat me to it, I was also going to suggest Fibro - I also have it, but according to the rheumy, it'll go away once my sleeping cycle returns to normal. As I've said before, he's such a silly man.

It's been 3+ years since I've slept normally and it doesn't look like it going to change any time soon.
Don't you just love Pulmonalogists? Yeah, mine says that I've developed a mild case of asthma; he might have a point as I sometimes just can't breath right (the more exhausted I am, the worse it can get).
Oh, welcome to the sero negative crowd (and for some of us, that also includes the biopsies). It's a pain in the behind, but I am waiting on something going positive, all these negative tests results is getting old. I do feel your frustration, and I can't really offer you a timetable or even a direction at this time - I'm still trying to figure all that out and waiting for my body to do it's next trick.
Hang in there and hopefully you won't have to wait to long.
Take care -
Patze