How can i fix my weird hips?

OK this might sound a little weird
because me myself have never heard/seen anyone with this problem before so i think something might be wrong with me but you tell me if i'm right
alright here it goes
the side of my hips go in instead of out
how do I...

get them to go out instead of in
i mean it doesn't all go in but on one side it looks like an S on the other side it looks like a backwards S so what am i supposed to do about that because i have this formal dance coming up and i got a really pretty dress thats skin tight but you can see my deformed hips though it so i really really really need help
exercises
food
anything that will help me in about a week's time
PLEASE I REALLY NEED SOME GOOD ADVICE
thank you so much

Has your hips always been this way?
Hows your posture?
Any pain?