I think Saint Dymphna, first on the list, is known as patroness for various psychological afflictions beyond anxiety. Anyway, works for me. EDIT: I see on re-reading than it says for “nervous disorders” in general — that is correct. She is a very kind saint and understands the little trials many of us experience. Highly recommended.
Never mind the first part of my comment; the list is just with respect to worry/anxiety. All of the saints on the list are known for other things.