“Nobody can hurt me without my permission.”
What you feel and how you react to something is always up to you. There may be a “normal” or a common way to react to different things. But that’s mostly just all it is.
You can choose your own thoughts, reactions and emotions to pretty much everything. You don’t have to freak out, overreact of even react in a negative way. Perhaps not every time or instantly. Sometimes a knee-jerk reaction just goes off. Or an old thought habit kicks in.
And as you realize that no-one outside of yourself can actually control how you feel you can start to incorporate this thinking into your daily life and develop it as a thought habit. A habit that you can grow stronger and stronger over time. Doing this makes life a whole lot easier and more pleasurable.