boob size?

so i am almost 14 (8th grade) and i am already a size 32c. my mom has really big breasts (size j; i know it’s very big and she is getting them reduced) and i am scared that mine will be big as well when i am older. my mom is always complaining of back pains and never finding anything that fits her chest size 😕. i got my period at 13.5 but she got it at 12.5. do you guys think that mine will be really big as well? please comment 💓💓