I understand how you feel about Miyazakis wonderful creations.
The whimsical and magical worlds studio Ghibli create are incredible, and the music is top notch, but it's the stories that really give them the powerful impact, I believe.
A common theme of the films is a girl who is in a situation that is somewhat out of her control, and bad things happen despite her best wishes.
Despite this, she is able to overcome the odds by finding strength/courage/love within herself and gaining the power to change the situation for the better.
For someone who has panic attacks, I can see how these can be so helpful to you. When they go from a chaotic situation to mastery over it, it must feel so empowering to you! I hope you can continue to be inspired by these wonderful films and not have to suffer so much from your attacks.
Also, just to add that my favorite one is Nausicaä, have you seen it?