How do you overcome max anxiety during the test?

https://news.yahoo.com/s/nm/20070219/od_ ... anxiety_dc

I saw this article on yahoo about how worrying about math makes you do worse and thought it describes what happens to me during the acual exam. As I mentioned before I did the kaplan home tutoring as well as the OG problems and reviewed a lot, but that didn't help at all.

In the back of my mind I kept thinking about how much money I spent on the prep course, the books, and the exam itself as well as all the time I spent doing problems, and how important it was for me to get the questions right. I was also thinking about everyone that was going to ask how I did and I didn't want to let them down.

The main thing I remember during the test is that the 1 question at a time, the question being on a hard to read computer screen, and the constant ticking of the clock all made me feel like I was being overwhelmed. If you gave me the problems on a pieece of paper and told me to turn it in whenever I wanted, I don't think I would have had that much trouble.

Unfortunately the anxiety caused me to think in very mechanical terms, and I started writing everything down and I'd get stuck on a problem and then not know whether to go back or just guess and move on. I felt like I lost my ability to look at a problem and reason through any tricks or see a number of ways to do things.

Is there anything I can do to overcome these nervous anxiety problems?