Can rhinoplasty improve my smile ?

I have a long nose but a bulbous nose tip and when I smile my nose widens making my face look pretty ugly. As long as I don't smile I look good but smiling makes my upper lip to stretch and that bulbous nose contributes to making my face look bad. I am 17 right now and thinking of getting a nose job done. So is it a right decision at this age and can getting nose job done improve my smile ...???