Don't worry, unless you're waiting for something you've ordered to arrive, you still have time to work on your stuff, and if you ARE waiting for something you've ordered, don't worry cause there's nothing you can do about it. To quote Christ, "Who of you by worrying can add one day to your life, or one cubit to your height?" ^_^
I know it's hard, but try not to stress yourself out too much. And yes, I am working hard to take the same advice, heh.