You don't say when you have to take the exam so I don't know your time constraints. Whoever said it takes 4 times to get something is right on the money! I think of the first pass as establishing a rudimentary path thru your brain. Each subsequent path reinforces that path and, the breaks between each pass allows the information to ruminate in your brain. :-)
Maybe you're trying to hard?? Try to relax a little. Sounds like your anticipation of taking the exam is causing undo stress. Good luck~~!