Hey I failed my mock test too. Then I passed my real one first try - failing the mock one did help, have your instructor help you with the things that didn't go right. Just because you didn't pass the mock doesn't mean you can't drive!! 5 weeks is plenty of time, if your instructor thought you were ready then probably nerves is what you need to work on.
It helped me just to imagine I was giving the examiner a lift. I was still very nervous on the actual test and my legs were so shaky I stalled 3 times, but I passed. If you're nervous, it's ok, just remember blind spots always.