Totally useless

After working so many extra hours after vacation, and the tension of preparing 15 students for piano evaluations, I cannot discipline myself to do anything useful this week. I teach because I have to. I do laundry because I have to. I clean the kitchen only so we don't die of germs. The garden will have to fend off the weeds by itself. What is wrong with me? I even have no desire to pursue my artist projects. Only a small part of me hopes this passes...the rest of me wants to sit for hours and daydream.