Hello. It's amazing how close your situation fits mine. My insecurity about my looks started a few years ago, when I saw pictures of myself from the profile view especially. I was only a little self-conscious at the start, but with time it took over my life. I also found Mike Mew and was certain that my mouth breathing had caused this problem. I was really down for a long time and I thought that the only way that I could live my life was if I got a double jaw surgery to pull them forward. At first it was for cosmetic reasons only, but I've noticed the problem that comes with the little space I have in my mouth. My tounge is constantly to far back in my mouth when I bite my teeth together, and I've noticed that my breathing though my nose improves a lot when I stick my tounge out a little further.
Anyways, I got an appointment at a jaw surgery clinic a while ago, and as I expected they didn't think that the problem was big enough to go further with. Instead they offered me a genioplasty to bring my chin forward, but I'm a little skeptical with that, as it won't improve the physical problems I have. I'm in a bit of a dilemma right now trying to find the right solution for me. the thing is that in my country I can get the genioplasty for free, but I'm not sure if that is what I want.
I'm 18 years old, and I can relate with the frustrations this can cause as I have went through 2 years of depression and anxiety because of this. I know you said that you would rather stick to the face and jaws, but I would like to say what helped me mentally, as it might also help you in someway.
The thing I would recommend you to try, and what helped me a lot, is to find yourself and understand the reason why we people always strive after perfection. We live in a superficial world and we have been brainwashed to think that we have to be perfect to be happy. A constant strive after perfection isn't the key though, and It will never make you happy. The thing you have to do is to find your inner self, the one that lies beyond your physical body and learn about the ignorance of everyday people.
It took me a long time trying to find peace, to find myself and to stop caring what people thought about me. I'm still in the process of learning, but things that helped me in the process, was to research the spiritual side of life, to meditate and eat healthy. This helped me getting the feeling of real happiness that I hadn't felt for a really long time back. Furthermore, a stronger form of confidence that I never had before.
An attractive face can certaintly help in this society, but It will never define who you are as a person. Never think that you're the person that people make you out to be, don't live in the box that society has put you in. The moment you rest within yourself, is the moment that people will see you for the person that you really are. A good quote for me is: Don't think less about yourself, think about yourself less.
Too some extent I'm actually happy that I have this problem, because it led me to a higher understanding of myself, that I maybe wouldn't have gotten If i was born with amazing genes.
I hope this helps a little bit, at least until you find out what your gonna do with you problem.