It is very important for you to be evaluated by a surgeon skilled in facial analysis. While a rhinoplasty will be very helpful for you, your facial profile is insufficient in the lower jaw region. In your case, orthodontic and surgical management of the mandible might be best. If this is too much for you, chin surgery might be an exceptable compromise (along with the rhinoplasty). Again, obtain a consultation with a surgeon not only qualified in rhinoplasty surgery, but also lower facial surgery.