Good Luck, my friend. You will do fine. Just remember that the examiner is there to PASS you. Nail the oral portion and 9 times out of 10, the flight portion is more of a formality. I was totally nervous during my flight portion...to the point of when we were taxiing back to the tiedowns, I said...."Well...I guess I need to schedule another flight with you after some practice." The DPE looked at me and said "only if you want to pay me more money for a joyride." Needless to say I was shocked.
The great thing about my DPE was that he said that he could see that when I was "flying the plane" and not thinking too much about what I was doing, I did fine. It didn't help that we had some nasty turbulence and light snow, either.
Just remember that once you get your ticket, the real learning can begin. The best advice my CFI gave me was to not just jump into the plane with your family and friends until YOU are ready. I did a few "solo" flights to check my own skills before I took the wife and family for a ride.
If you thought it was fun flying around with a CFI in the left seat....wait until you bring a non-pilot along for a cross country and watch how big their eyes get!!!
Be safe and good luck.
-Yuppie