Hang in there dstr, the CNOR is worth it!
From what you said, studying for a year, it sounds like you already feel it's worth it, so I say, keep at it.
The first time I took mine, I was afraid that I would be so lacking in heart and neuro (my hospital doesn't do 'em) that I would fail. Long story short, I still had enough scores to make up the difference.
Sorry for my lack of info, but do you get a report on your scores? This could give you an idea to work on if your scores were low in a certain area.
Talk with others that have been thru it, study guides from the CNOR people and AORN may help.
Just a thought,,,,,you said you studied for about a year.
Maybe you over prepared???
Treat the whole thing as a learning experience.
Keep at it, good luck.

Let us know how you are doing.
Mike