It is perfectly natural to be nervous during an examination but you may need to overcome exam stress if your stressed state interferes with your ability to perform well. Overcoming this anxiety can make taking a test for certification or academic testing easier than you ever imagined.
The first step is to take an objective look at your situation in order to determine the source of your anxiety. This can be time-consuming but it can provide some exam self help to assist you as you work through your nervousness. Objectivity is very difficult to attain on a conscious level but you can take steps to become more objective through hypnosis.