How could I fix an asymmetrical face? I'm so insecure!

I am 20 years old. When I was little I use to have a good face structure but then when I needed braces I did not get them which cause me to chew with mostly one side of my mouth and that cause my face to be very crooked and I was wondering if that could be fixed, I look very different in the snapchat camera and then the actual camera that the iphone has and I know its because the iphone flips it. So is there any way my face could get symmetrical like in my snapchat pictures? how invasive?

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