i want a breast reduction

when i was a younger, boobless, girl, i always wanted honkers. then at around 11 or 12 they started growing and they haven’t stopped since. i’m 21 now with 38 E’s (sometimes a 40 DD depending on the brand) all i know for sure is that they are huge, they hurt ALL THE TIME, and i can’t wear normal clothes. truth be told i don’t even know what shape i’m in physically because in everything i wear the boobs just take over. i know i’m young, but i feel like i’ve tried everything including diet and exercise. they just keep growing. i’m sick of crying every time i go to try something on, i’m sick of not being able to sleep on my stomach, i’m sick of not being able to run or walk down stairs, or do ANYTHING without them smacking me in the chin. i’m just sick of them. i don’t want them gone, and i don’t want them tiny, i just need relief, man. i’m scared if i get a breast reduction that my nipples won’t be proportionate to my boobs anymore, because those things are massive, too. i just need advice.

EDIT: i have been fitted all throughout my life for a proper bra. there is still a change i’m not wearing the right size and i’m working on that, trust me. however, the correct bra size won’t make them any smaller and it won’t stop me from being able to fit into clothes that i want to wear. it won’t take away my insecurities and it won’t stop me from hating what i see when i look into the mirror. thanks for everyone’s help, though!