What kind of surgical procedure do I need to correct my face/chin? (photos)

I'm not sure what type of surgery I need, but I figure it has to do with the chin. I have attached pictures so you can see my face at different angles. I hate the way that my face looks cosmetically. Not only this, but there is a uncomfortable lip strain when my lips meet. My resting face is more comfortable with the lips separated and therefore I always leave my mouth open. I would love to get some input from professionals on here before I seek advise elsewhere. Thanks so much for your time.