Why do I always feel like I should be doing something?

Today I am tired and cold and just want to sleep. My minds says "NO" you should be doing something, anything. I dont want to exercise, I am too sore, I dont want to clean, I did that yesterday, I dont want to bake, or even move. I wish I could just do nothing. But I have guilt! Staying at home makes me feel like that way. Since I dont work, well one day a week, then I should be doing something productive. Other people can relax, but it seems I have some issues with it. Even at my massages I am never relaxed, always thinking what do I have to do next. I need help!!! LOL...... have to run more later...