How to improve bottom 3rd of face? Would a genioplasty advance my receding chin despite deep labial fold?

I don't understand why my side profile looks like this. It seems I have loose skin under my neck, specifically on my left side profile more than my right. Why is this happening? Im 150 pounds 5'10 so I know it's not my weight. And why is it more apparent on my left side? Do I have a receding chin? I don't want to have an implant, but I was considering a genioplasty. I want to understand my side profile. I really would appreciate professional advice as I am very sad and lost on what to do.