Will my grow bigger?

i'm 14 and have a 34a. my mom has really small s, i'm talking smaller than mine, but my sister has b's. my moms side of the family has normal (like b or c) cept for her, and my dads side is just huge. my sister's had her size since she was my age (so she says), and i know im only 14, but is this the end of it for me? i have a pretty big and hips, and i feel disproportionate, but will i grow to be at least a b? most of the girls in my grade have bs now anyway and i'm really self conscious, especialky around guys. please help!