Taking the NAT

I just finished my last two pre-reqs (Micro and A&P 2) and am getting ready to take the NAT in the next few weeks. I've looked at the types of questions and brushed up on my math skills (by far my weakest subject...especially without a calculator.) However I'm still incredibly nervous and really don't know what to expect when I walk in there. I think a lot of my nerves is the fact that this is my last hurdle before getting accepted into a nursing program. I have a 4.0 in my pre-req classes and a 3.8 overall so if I don't get in it will be because of this test. If anyone has any advice or suggestions on getting through the nat with my best possible scores I'd really appreciate it!