Hi Ximena,
I would assume that you have completed the majority of your study plan and currently finding ways to continuously improve your score.
I have two tips for you:
-Watch and maintain your stress level, if possible finish all your studying by day 17-18, and enjoy yourself a bit
-Finish all 8 of the mock exams in the Prepcast Simulator, then do some more (plenty of online mocks and books available)
Wish you luck to your exam, it is going to be a great start to 2019!