How do you react when someone tells you to calm down?

Because when someone says it too me, it just makes the situation worse..you don’t know why im worked up or upset or stressed out…and usually when I am I have a good ass reason to be…so why should I calm down? I want you to realise there is something urgent on my mind…it picks at me and wont stop..as someone who feels things very vibrantly without meaning too…I cant help how I react…and yes I know I can choose my behavior and my actions….and you know this about me…so why is it..that all you can ever say to me when im upset is…calm down…

all I want you to do is ask if everything is alright, or what’s wrong..because it makes everything so much easier to say….