I really need help for girls but if any guy thinks he can help free tpp?

ok so for girls it normall to have your hips start develloping when you are like 11-12. right and still only one side of my hips have developed and it really hurts when i want to belly dance and twist my hips it fells unconfortable does any one know what i can do? plsss by the way i am 15 going 16 this year