Hi there,
Since you are female patient who is above fifteen years of age, if the lower jaw is grown out as you have described then you might mostly require a surgery.
But, First get an expert opinion from an orthodontist on the severity of the malocclusion. Because less severe cases of your age can also be possibly treated without surgery.
Next Steps
Meet an Orthodontist for opinion & Treatment.
Health Tips
Treatment options would be more if you get treated immediately.