Starting PCCN process

So my goal is to have the PCCN done before August. I recently took the month long AACN formatted critical care class (ECCO) that was offered at a local community college. My telemetry unit sends nurses there several times a year to increase the knowledge base on the unit and also requires you to do it before you begin doing Charge. I bought the PCCN Certification Review book by Brorsen and Rogelet and have been doing practice questions from that. I also have the workbook/textbook that we used in the ECCO class as a reference along with a Critical Care Nursing textbook from nursing school as a reference. I was wondering if people who have taken the class think that this would be enough study material and your reviews if you have used this practice question book. Any study tips?? My ANM goes to a PCCN/CCRN review every year and gave me all her notes that she took during the two day class too. SO nervous because I've heard horror stories about these tests! I'm normally a pretty good test taker, did very well in school, but it's been 2 years since college and this whole study thing is just not as easy as it used to be!