Anxiety walking in the street, subway

I have had several ‘minor’ verbal and physical aggression over the years by men, in the streets and in the subway.

I have now regular anxiety when I go out. I don’t feel secure, I am always wary when someone passes me by, especially when I am tired. Even with my family or friends, I always check the environment and can’t always focus on the people I am with.

I tried a model, and the thoughts I have are ‘I won’t manage to go out and be normal, not be afraid of people, I never know what can happen’.

I would like to feel safe, appreciate going out, even among crowds, and think about my friends, my kids.

What thoughts could I use to feel secure? How can I really believe them? Do I have to ‘prepare’ myself, do a model before going out?

Thank you