my dear great friend anxiety

I should have known, When my legs began shaking and it feels like my world is fading when I stepped into the unknown That the darkness has enrolled Take slow breaths in and out Oh no what is this about A struggle to breathe it is driving me to my knees Who am I?What is this? Is it my fault?What triggerd this? Oh nevermind,it is just another visit From my great dear friend His name is anxiety,have you met him?