Is excelsior a good route for me

I failed two clinicals in nursing school during my 3rd semester and don't know what to do. I want to go through excelsior but terrified that I will fail the CPNE even if I study 6 months in advance! I have extreme performance anxiety when I'm being evaluated. I remember being evaluated during head to toe assessments and I will ALWAYS mess something up. Every evaluation I perform, I always have to repeat it, even when I repeat it, I still miss something minor but the teacher just lets it slide. I know with the CPNE they will not let anything slide or did I read these post wrong. Do you automatically fail or what??