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).
Passionflower Tea. Passionflower has the flavone chrysin, which has anti-anxiety benefits. It works best for people with anxiety who also experience a lot of circular thinking or obsessive thoughts. Try a cup of passionflower tea before bed to calm your mind.