Sherif,
If I could give you 1 item of advice that hepled me is to take many sample exam questions and for every question missed, read the section in the PMBOK. You have several weeks before your exam. I would recommend to do 50 sample questions every day and look up the wrong answers as I mentioned. Plus don't lose sight of the framework big picture. Its easy to get lost in the 42 processes, but there is a big picture to all of this. Hope you do well in your last try! Be confident - picture yourself passing the exam every day!