Don't stress too much!
I understand that you will be nervous, but I'm sure you'll do fine, especially if you have been throughout the course.
Have you been having frequent (weekly-ish) assessments? If so, these should indicate how you've been doing, and if there are any concerns, your trainer(s) should have been attempting to provide you with the support that you need.
It may vary from TOC to TOC, but if you were to fail, some TOCs will provide you with support and allow you to sit the assessment again.
It does concern me that you don't appear to have been told what will be in the test - it should be a little bit of everything (except anything that your trainer(s) have explicitly told you will not be covered). Maybe ask your trainer(s) for clarification?
All I can suggest is look through your rule book and notes, and try to brush up on all you can, but do it in short, sharp bursts. Maybe 20-30 minutes revision on something specific, then 20-30 minutes off. The night before, go to bed early and try to have a good night's sleep. A nice breakfast (bacon and egg bap, I'd recommend!) on the morning, and bring a nice snack (especially if you have a break during the test). Of course, make sure you arrive in plenty of time without needing to rush! It's amazing how much little things like a good sleep, a good breakfast and arriving in plenty of time will help you!
I'm sure you'll do well, but if things don't go as well as you'd like, ask your trainers what they will do to support you. And assuming you are a union member, speak to your union if you don't think the trainer(s) are supporting you correctly.
It's my understanding that at my TOC, the vast majority pass the rules exam, and those who don't have usually received extra support in advance and it's not a complete surprise!
Good luck and please let us know if you need anything else.
