Panic

Hello everyone! I will be taking my NCLEX this coming April 17 and I am panicking right now even though I've been studying really well. I graduated year 2010 in the Philippines and I never worked in a hospital before. I chose to work in a government agency as an admin staff because of the poor job market for nurses in the Phil. Now I am here in US and I am preparing for my exam. I did an assessment exam from Kaplan, Saunderz and an online website given by my aunt who's also a nurse here in US and good god the highest that I got was 59%! So I focused on the content first, I made a system by system review using Saunderz, if there's a topic that is not clear to me, I usually consult my Lippincott Med-Surg. Now its been 3 weeks of intense review but I feel like I am not retaining any of the topics I've read but everytime I take an eval exam I always get 70-78%. I feel like I am not ready yet. My remaining two weeks is for Q&A, I am just finishing up my Lab and Pharma. Can you guys give me any tips or anything to help me calm? Waaaah!Please I so badly needed any feedback from you people! Thank you in advance!