Thanks to everyone that replied. It seems if I have a couple of "good days" (which of course are relative to how crappy I feel usually), then I wonder why I'm not trying to do more. That's when the guilt hits for me. Like I have some doubt that I'm really suffering, like no one else can "see" the PCS, maybe I'm imagining it. Once that doubt is there, then I start to feel like I'm malingering or something. Of course, once the symptoms rear up again (which they invariably do) then I wonder what I was thinking in the first place. This just messes with your state of mind continually.