What is the cause for my uneven lips and nose? They point to the right side of my face. (photo)

I realize that it could just be because one side of my face is larger than the other or because of an uneven jaw etc but I was hoping to get a better idea of the kind of specialized doctor I should see. Things to keep in mind: -I have a deep overbite -I have never had braces -I lost one of my canines and have a fake tooth that has replaced it -A year ago I had fillers injected into my cheeks and Botox placed on the sides of my jaw to even them out. This still did not help my lips or nose. Thanks!