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).
Here are 7 natural anti-anxiety herbs for reducing anxiety and stress (and the documentary video). This amazing herb, related to ragweed, can be brewed in a tea or taken as a supplement, and it has been used for centuries to ease the mind and calm frazzled nerves.