How can my jaw look normal? (Photo)

I am 19 and my classmates and family kept noticing my asymmetrical face and long chin (but i know its just my jaw) and I am so ashamed. I'm starting to have a lack of self-esteem especially now that i'm in my teenage years. My face doesn't look like this before but I think it's because I had many molars extracted already. What kind of doctor should I be looking for? and Is a checkup free? Because as of the moment, I'm only a student.

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