Nope. It's not just you. I'm that way, especially today. Maybe it was the bad news I got or maybe it's just that I've never had much energy, anyway. I've had depression almost all my life. That's what makes it almost impossible to take care of yourself.
Most times, I can just push through it and go ahead and do what has to be done. Of course, I use my arthritis as an excuse to sit down and "relax" every few minutes. Makes it convenient.

It's the getting back up and getting on with business that is a pain!
What works sometimes is telling myself that it doesn't matter whether I'm sitting at the computer, watching TV or just vegging out, I'm still gonna feel the way I do, so why not just get up and do what I need to do and at least have
that aggravation out of the way. I give myself permision to go ahead and feel bad, feel sorry for myself; it's okay.
Just get up and do it! 
Like I said, sometimes it works, sometimes it doesn't. Good luck!
<font color=blue>"The winds of change continue rolling and they just carry me away."</font color=blue>
__________________
Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.