How do I convince my mom to let me get a nose piercing?

Courtney • I'm Always Here For You 💜
I've been asking since I was 15. I live in CT and the age to get a nose piercing is 14. I got my belly pierced at 15 with years of begging. I understand the risks of nose rings and the infection, I'm good with keeping up with cleaning. My grades are amazing; all A's, 3.8 GPA  and I'm an amazing person I would say. I just don't know how to convince her. Any help?