question? girls please!?

i didnt get my period until 14 almost 15 im 17 now. recently my shoe size went from a 8 to a 8 1/2-9. my are a full b but they to seem like they are growing into a small c. (34). my mom has no but my gma does. does your mom not have s but you do? is there still time for me to grow!!! i hope there is