Kaplan and NCLEX in Summer of 2009

Okay, I test next week and I am scared to say the least. My scores are not that great for Kaplan. Should I postpone the test or take it?
Scores:
Question Trainer 1 53% -Took before class
2 63%- Took before class
3 48%- Took before class
4 60%
5 58%
6 61%
7 Gonna take this weekend.
Quiz Bank average 58% ( I only have 100 left to do).

I have been reading about people passing with similar scores...but not sure if I am read. I think I am borderline, but Kaplan book says 65%. Most people who get that score pass in 75. I hate to postpone. I just want this thing looming over my head to be done. I slacked off questions and I have done about 300 a day for about a week now. Trying to make up. My q-bank scores are now anywhere from 58-70%. I still need to review pharmacology (as it was not even required for graduation from our school!)

Any advice would be great!