booty!

A_ • My life is confusing 🤙🏻
So im 15 and i go to the gym every other day, i have an extremely small chest so my butt became my priority. Even after almost 9 months of going by butt is super jiggly. Im not asking for it to be rock solid but i thought it would tense up after all this time. Its jiggly to the point where its making me uncomfortable 😂 is this like normal? Or do i need to change something??