Aww Nicky, nerves can be good it shows you care enough to do your best and thats the problem solved...if you really have done your best.
Try get some good rest and sleep tonight, eat well in the morning and get there in time, (you dont want to be rushing and adding more pressure to yourself)
I know its easier to say than do, but above all stay clam and relaxed, and you will surprise yourself of how much you can and do know in the exam.
Whatever you do, so long as you prepare well from now till morning, you will be happy knowing you have given your best and I'm sure that will be just good enough to give you a result you deserve.
I hope and pray it goes well for you sweet heart, good luck, and if you pass I'll let you sniff my glass of rum....

Good luck Nicky