How can I fix my slanted jaw? (Photo)

I've noticed since I was young that I have a slanted jaw and it effects my whole face. My right side is lower than my other and I find it also makes my smile uneven. I find it really hard to smile with my Mouth closed. My lips droop down on one side and nose is crooked aswell. I wanted to get into modelling but I'm too self conscious with this. I feel in limbo. What is wrong and how can I fix it? Should I schedule a consult with an orthodontist before a maxilliofacial surgeon? Please help!!

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