Good day Rachid,
I extend to you my confidence as you near the end of your journey on gaining PMP certfication. By taking the practice exams, I think you have assessed yourself to be very close to ready for the real exam. Therefore, I'd like to offer you this recommendation in answer to your question.
A good tactic is set a goal of 80% for scores and count the time back from the date of the real exam. You'll want to stop about two or three days from your last practice exam and the real exam to rest your mind and body. Between now and that stoppage point, consider taking about 1 practice exam per week so you can acclimate your mind to sitting for a 4 hour exam and also give yourself time to research questions you got wrong. As you get comfortable, increase your test taking to perhaps one a day or every day until the stoppage point.
If you have any questions, you may use this forum, given that you identify the source of the material, to help explain further some of the information that you might find confusing on the practice tests. We're here to help.
Good luck