When you first get your braces on, your teeth will hurt for a few days, as they will every time you get your braces tightened or your wires changed.
Chamomile is also popular for anxiety in children. Fennel. Fennel isn't for anxiety specifically, but it is linked to treating some of the most common symptoms of anxiety, including digestion, coughing (many with anxiety have a nervous cough), and asthma (anxiety can exacerbate asthma symptoms).
In one German study, a specially formulated lavender pill (not available in the U.S.) was shown to reduce anxiety symptoms in people with Generalized Anxiety Disorder (GAD) as effectively as lorazepam (brand name: Ativan), an anti-anxiety medication in the same class as Valium.