Jonah experiences nearly constant anxiety that is not associated with a specific thing. jonah is most likely to be diagnosed with

Generalized anxiety disorder

This is a chronic disorder that involves consistent and severe worry about so many things. It is not easy for persons with this disorder to control their worry. They anticipate and wait for the worst even when there is no visible reason to be worried. This disorder occurs along with other anxiety or mood disorders and it can be a long-term challenge. From the question given above, Jonah is most likely to be diagnosed with generalized anxiety disorder.