You could possibly have poland's syndrome a congenital absence of the pectoralis major muscle. When you attempted to build up muscle on the affected side you increased muscle mass within the pectoralis minor resulting in the appearance you describe as the pectoralis minor only extends part way across the chest wall.
I am in agreement with the other plastic surgeons regarding the need for a lower facelift. While the smart lipo does a nice job with the excess adipose tissue of the neck and jowls it does not adequately address the skin laxity and lack of fascial support.
the apparent change in your chins projection is not an actual anatomic change but the result of the change in the relationship between your nasal profile and chin due to the rhinoplasty. You need to reestablish a natural position of the chin relative to your nose by increasing anterior projection and decreasing downward length.
