Do I have a weak jawline and should I get jaw surgery to fix my under bite? (Photo)

I have a slight under bite and I also feel like I have a weak chin because sometimes when I smile it looks like I have a double chin. I have had braces twice and I am really insecure about my profile because I feel like my jawline is not very strong and it makes my nose look big. When I smile from the front my jaw seems to stick out and also go slightly down which makes my face look really long. Is this me being insecure or does my profile look odd?