im taking my cpc exam thurday 5/13, im extremely nervous... havent been able to sleep since saturday, i want to pass so bad, i m worried about siting for 5hrs and 45 min and to keep a good focus, i have been studying my butt of for the past week very hard, today i did 3 hrs of practice exams and it just kills me to sit that long and focus, i have to get up and take a break, is it different when you are accually taking the exam??? ive heard it goes fast?