a small dog in a big world

I live with daily anxiety. anxiety about everything and anything. it is exhausting. I am always looking for ways to have a non anxious life.... some days are better, others are awful and I want to hide all day.
on days where is is really bad... I look at my little dog. my little chi mutt. she is tiny.... ok.. small... all 11 lbs of her. in her mind, she is the biggest, toughest dog in the world. she has no fear.... she will take on the biggest dog and lunge for the jugular in the process.... needless to say... she is not around other dogs. she is reactive, she was abused by her first family. I rescued her knowing she had some issues...food agression, reactive, not socialized with other dogs early enough... so she is special... needless to say she would be deemed agressive at a shelter and be put down. her might is like my anxiety. it is strong, overpowers all other senses and only gives me to options... fight or run.... while my dog will choose fight...I will choose run... unless you creep up on me... then my first response is attack first and ask questions later.