I know how you feel, I also got 75 questions and failed and felt like the dumbest person alive. It took me about a week and I got back to studying. I am doing Suzanne's plan, it appears to work, there are a lot of success stories.
I know it's hard but you have to jump back in here, you can do it, if you couldn't you would not have passed nursing school. Now, I realize the nclex does not define me as a person or a nurse. It just a test that we have to pass and we can do it. My prayers are with you.