I'm up, too. Maybe not walking & talking...but awake. My sleep habits have become increasingly strange. I get home from the retirement place my Mom is at a little after two PM. About four I start fighting to stay awake. I try & stay up till eleven or twelve, & I just know that I'll be able to sleep. Wrong! If I do fall asleep, it's only for an hour or two, then I'm wide awake. About four or five AM I might be able to drift off, but only for an hour or so. I'm dreading it, but I think I'm going to have to do another sleep study. They wire you up like a stereo, to where you can hardly move, and then tell you to try & fall asleep as normally as possible. Sure, no problem. So, the cycle starts again...