I don't know if there are people who live without it. Anxiety, that is. Are there? I can't imagine that kind of life. For me it's like the kettle is always getting ready to blow unless someone rational pulls it off the burner.
I might fixate on a situation until I can't think about anything else and my heart is pounding and I'm sure I'm going to stress myself into a heart attack or a stroke and become an invalid so Nicholas is burdened with my vegetable-care and can never have a fulfilling life of his own. See? "Fixate" is a euphemism for "obsess." My favorite therapist used to say "I'm a little concerned about your tendency to obsess." She said it with extra calm and care as if using too-strong words might set me off. But it made me laugh.
I've been using one of her techniques to break my anxiety lately -- deep breath, hold it, count to five, release, repeat. It's a distraction if nothing else. Another thing I've tried is little meditations from a book I found in the library. But today I was so deep in it, I couldn't even comprehend the words. I just paced the library, flipping the pages and reading, hoping something would stick to my subconscious.
The best solution to breaking my anxiety is talking to a rational person. If I can describe the situation and hear them reframe it in sane-speak, I almost always settle down.