Is it loss of collagen on one side or Bells Palsy? I want to correct my facial asymmetry. (Photo)

Help! My dentist asked me if I had Bell's Palsy after she removed my braces. I had thought that my crooked smile would be fixed with thae braces but apparently not. That was back in 2009. My smile is still crooked (my right side is stronger). However, this is also the side that sags pulling my nose to the right as well. When I look in the mirror I look symmetric though but in selfies and pics I don't. How can I get a symmetric face!! It bothers me. No surgery though!

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