adenuff, it is now almost too late to learn it all so just calm down, read over any parts you think that you are not good on and then have a good night's sleep.
Tomorrow just accept that you will either pass or fail and that worrying will not help. In fact it may prevent you remembering what you do know and make matters worse. Relax a bit and answer the questions to the best of your ability. That's all anyone can ask you to do.
Since you obviously care enough to ask for help I think that you probably have already done enough to pass. So go in there and show the examiners that you do know about the subject.
Good luck and let us know how you got on.