Driver's test anxiety

Last week I took my driver's test and failed due to a couple of mistakes I made during the road test. I was devastated; I cried the entire drive from the DMV to school. I'm retaking the test next Tuesday, and I can't stop worrying about it. Last night I had a dream that I failed it AGAIN and today during school I nearly had a panic attack. Does anyone have some words of wisdom, or stories of their own? I'm going to go back to the DMV when they're closed to practice the course but for some reason I just can't imagine myself passing the test.