where to start

I’ve got my CPC case study theory test tomorrow , wish me luck.
little bit annoyed because of the long wait and also because initially I booked it for the 22nd of December which was just one or two days after they announced the lockdown , I studied a lot for it and was very confident to pass but now I have forgotten everything , I booked this test only Wednesday and been studying but feel a bit stressed I might not have given myself enough time to pass .
we shall see .