Improper jaw alignment?

Ok My jaw is always hurting And it cracks frequently. I get headache and migrains ever since my teeth started to shift when I was about 9 I'm now 14 and I still getting them. I keep hearing this ringing I'm my ear. And my jaw cracks and pops when I eat or whe. I wake up. My mom says I bring my teeth when I sleep. I also noticed a chip in my front tooth. I'm getting braces soon what do you think the'll do to fix that? Thanks