Nothing in life is guaranteed!! You can study supper hard and STILL not pass. It's testing your ability to take a test. I also have friends that NEVER study and pass. I am feeling from your comments that you have a real deeper fears. Did you set yourself up for failure so you could get out of being a nurse? Do you want to be a nurse? These are questions you can only answer. As far as your worthiness to be a nurse... Honey I've been an Rn for 30 years and you just need common sense and a passion for your patient and you will be AMAZING. You got a lot to ask yourself but stop beating yourself up. It is what it is. Good luck love!!