I was also going to mention EMDR. It is almost like hypnosis. The therapist generally waves two fingers in front of you and your brain quickly processes parts of life history, and often the focus is trauma or a source of anxiety. Beforehand, you decide on a place or situation that makes you feel safe. After the visioning part, you then imagine yourself in your safe place (like curling up with a dog). It is incredibly potent.
Tapping , also called EFT, also helps.
Finally, I myself use Tai Chi. I don’t have anxiety in my adult years, but the slow meditative movements really help wash away whatever angst I am dealing with in life. I have often wanted to teach teens. I go to an assisted living facility and teach them and they seem to like it. Try it!
ps Just want to mention that migraines are NOT caused by stress or anxiety. Migraines are NOT a psychological problem. They are a neurological problem. Granted, stress can be a trigger, but the person already has the tendency for them.