(((hugs)))
I know how you feel, I would drive great on my lessons, and even on the practice lesson before my test, but as soon as I went on my test, the nerves would get the better of me and I'd fail. I failed each test on a different thing, it would have been easier to deal with if I kept failing on the same thing (at least I could have worked on it to improve).
In the end I took rescue remedy, calms and used a hypnotherapy/relaxation driving cd which I borrowed from library leading up to my test. I found the day of my test I was alot calmer and not so nervous, in fact I chatted away to the examiner as I felt so confident.

Good luck, you will get your pass.

Karen x