Deep breathes. Your job does not depend on this test. Nothing but obtaining a piece of paper that says you took the course depends on this test. You can still buy a boat and you can still sail even if you get a goose egg on the test. There are many competent sailors who never took a course or had to pass a test. What matters is what you learn and learning what you need to learn yet.
Also remember, the ASA programs are a business, not a licensing agency. If the tests are too difficult or too many participants fail the test, it would be bad for business.