This is the reason why most people fail the test. You need to be more confident and sleep more. Don't only study the day before test. Study all you can and dream about what is going to happen after you pass!🙂
There is really only (2) good cures for nervousness. Hardwork and experience. If you dont have one, then you need to work on the other. Study hard, such that when it comes time to take the test - you crush it.