Do I Need Braces? Estimated Cost? How Long Would I Have to Wear Them? What Kind of Braces? (photo)

I had retainers for a little bit, wore them at night which fixed the gap between my teeth. Would braces be worth the expense? Most people tell me I already have almost straight teeth but the side view is horrendous, you can see mostly my gums. Front on everything looks perfect. I think my jaw is not wide enough or something like that. Pics below.

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