I want Advice.

I’m genuinely overthinking this tremendously. I want to pass my GED test, I’m taking a 6 week course monitered by a teacher and I’m also on my 3rd week. I never was good at taking large tests due to test Anxiety and I am scared of failing the test, I want help conquering this test so I can pass it. What can I do to improve my test taking skills or even my really bad test anxiety that can make me forget what I learned?