why does being anxious make you physically fucking ill/help with being anxious

i've never experienced the kinda pain i have when i'm anxious. it's like the shaky feeling in ym chest travels to my knees and then it paddleballs back to my chest, and sometimes it'll even make my head throb.

my mom is really dismissive of my mental health and how i'm doing physically, but i don't mind it too much because there's nothing ever really wrong with me in the long run. there's some sad feelings here and there, but it's only because i'm anxious. when i feel that wave of anxiety come on, i immediately jump to my phone and headphones because music helps me calm down. i can't find my headphones and i'm actually dreading going to school tomorrow. 

does anyone have any ideas on what i can do?? i don't think i'll be able to find my headphones until tomorrow and i feel like i'm about to have a panic attack all over some music.