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).
Other supplements that can aid in relieving anxiety include zinc, which helps calm the nerves; amino acids, which may boost the function of neurotransmitters; and vitamin A, which contains antioxidants that can reduce stress.