Two thoughts which might help.
The first is that your instructors will only put you forward for the test if you are ready for it. So just do as you've been doing, and you'll be fine.
The second is that examiners want you to pass. They are human, they don't like failing people any more than you like failing. So all you need to do is not give them a reason why they have to fail you, and you should be fine.
Good luck!
FFF
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