How to stop always being in protection-mode?

It seems that no matter what I'm afraid for my safety and the safety of loved ones. Like no matter where I am, my mind like constantly thinks someone wants to do something to me or really hates me. Also, if my sisters are hanging out with friends especially guys. I get extremely protective and worried but nothing has ever happened with her having safety in danger.

How to stop always being in protection-mode?
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