It seems like you have all the resources you need to pass. I know I did the first time but I failed like you at 75 questions. It was the nerves for me but when I changed my strategy on how to attack the test I passed the second time with greater confidence. Have faith in yourself and don't give up!!
RELAX and calm down! Your putting too much pressure on yourself just days before the test. Don't do that. Just remember not to second guess yourself and critically think with every question. You got this! Good luck