Anxiety, when undescribed, is an amorphous, raw force that triggers primal instincts in you that puts you in an alarmed state.
It is a large, undifferentiated threat signal. For the ancient you in you, it is not different and just as much as a threat as the last.
Unlabeled anxiety is processed by the amygdala, which generates a fear response.
When you can accurately describe it, you define its boundaries.
It becomes something understandable, and processable by your pre-frontal cortex.
The pre-frontal cortex is good at analyzing, strategizing, and executing. It drafts a plan-of-action.
As an added bonus of our social structures, it helps us communicate our needs to others, and solicit advice or comfort.
Knowing (and internalizing) that this is what goes on in your brain isn't enough.
Your primal limbic system is faster than your pre-frontal cortex.
It generates a fear response quicker than your pre-frontal cortex can a rational one.
You will have to right yourself everytime, after the fact.