Can philosophy help with anxiety?
Yes, but not necessarily by replacing therapy or pretending anxiety is just a bad argument. Philosophy can help with anxiety when the anxiety is intensified by unclear values, false premises, catastrophizing, or confusion about what is and is not under your control.
For example, if you feel anxious because you think "If I disappoint someone, I am a bad person.", the philosophical issue is the standard you are using to judge yourself. If you think "I need certainty before I act.", the issue is how you handle knowledge, risk, and action. Reason helps by bringing those assumptions into the open.
A practical exercise is to write three columns: facts, feared interpretation, value-serving action. If the fact is "My weight went up two pounds overnight.", the interpretation may be "I failed.", and the action may be "Review the weekly trend, train, and eat normally.". If anxiety is persistent, panicky, trauma-linked, or impairing daily function, use qualified mental health support.