That's why you practice. Most of violin playing IME is more about mind over body than anything else by far, so don't allow yourself mental blocks. Just start slow and work your way up to speed. Er, I think the Heifetz arrangement is the only one, but I could be wrong. Have you played Kreisler Praeludium and Allegro or Vitali Chaconne?
Good luck, I'm sure you'll pull through! All nighters are the worst though, I can only pull them like twice a year.