AMSN Certification soon, any suggestions or help?

I am ready to take my Med Surg cert next week and am so nervous. Any suggestions? I feel like I should have studied more but could really only find one book with sample questions in it. Any suggestions? Give me an idea what the test is like ? Lots of medication questions? I am so afraid I will get tons of Chemo questions..I have never had any experience with it at all. Anything would be appreciated!