You might be able to minimize your anxiety by relying on multiple sources - not just ATI's official book, but also additional matter such as Mometrix's TEAS Secrets book. Online resources at tests.com allow you to take multiple versions of the four test types, and are well worth the $19.95 IMO. Those, in conjunction with a lot of face time watching Khan Academy and Crash Course videos, filled in a lot of gaps in my knowledge, especially in the maths and sciences. , The oniline test prep products from ATI and Union Test Prep might be helpful.