NCLEX....to study or not to study....

HELP! I take the NCLEX RN on January 20th, 2 days from now! (graudated on the 17th of December) I am starting to get EXTREMELY nervous (just as I did before the NCLEX for LPN, in 2013) I did not study after graduating, and ended up taking that test about 6 weeks after graduation (soonest I could take it, I swear I live in the slowest state for processing) I just felt that I was in school learning this stuff all year, why do I need to study? I should already know this stuff! Of course, I got nervous with that one too, but never really studied, and passed after minimum questions. I have been playing around on Kaplan since RN graduation, and stay around the 65% mark on all the tests (I have taken maybe 4 since school) I just wanted to know if there was anybody else out there that felt like I did, and that you should know everything from being in school a year, or if everybody just studied?UUUUUUUUUGGGGGGGHHHHHH!!! I am just ready for this to be over!