Know the feeling well guys - I had my QXC postponed 4 times and my Skills Test postponed 7 times (almost went on 2 of those occaisions, had examiner in front of me and everything....).
Try not to get to bummed out by the waiting..in the event the whole thing was over and done with before I knew it. I was very fortunate on the day, there was another pilot who was doing a ME revalidation and he and the examiner very kindly let me sit in the back for the flight...superb, first flight in a light twin and all.
THE best tip I can give for the test is to remember that the examiner is looking for a safe and competent pilot - not a perfect one. If you make a mistake then don't let it throw you.
Good Luck
