I am 24 years old, i weight 96 pounds. my beast is still not growing. i get my periods on time. what should i do . i feel i look very funny :(?

It depends : On what you want. If you think your breast are small then fat injections /grafting vs implants may be the answer.

Congenital: Congenital hypomastia is a condition which may explain your development. It runs a spectrum from asymmetry of size, pyramidal shape, constricted lower pole or herniation of the breast tissue through a constrictive band. The most severe form has lack of pectoralis muscle as well (polands syndrome). These conditions can be treated with reconstructive surgery with an attempt at insurance coverage.