Often, anxiety takes root because a person’s external character is incompatible with his or her inner self.
The anxiety may dwell upon other issues and obsessions—but none of these are the true underlying cause.
Most souls can tolerate a few inconsistencies. But others are sensitive to every nuance.
As soon as some aspect of their lifestyle is not attuned to the purity of the essential self, the entire person is thrown off balance.
That is why, for a Jew, being more careful about the mitzvot will often diminish anxiety.

Anxiety is similar to a medical outbreak in society, once you hear about it then you might begin to worry if you have it. Stand on your own two feet and have a talk with yourself about anxiety. That talk should involve how you are feeling about an anxious feeling you're
having, how, why, where and when did it begin.
Do not accept some crazy idea from anyone;
and have that much needed heart-to-heart talk
with G D. Both you and G D know yourself better than anyone else or any hearsay. Never
allow anxiety to take hold of your precious life.