Try distracting yourself, Since you have not started it could be easier. Read a book, watch a movie. The number one thing to do is to get some exercise. Having the heart rate increase decreases the thinking. Totally zone out, don't think just exercise. IE climb some stairs, run, jog, power walk, go to a gym (if you can). ButterfliPrincess you can get through this, and just don't start to si, it's easier if you don't.