Jaw Implant Surgery Revision

I had jaw implant surgery a few years ago to improve the balance of my face which needed vertical length rather than any form of projected chin, after the first surgery I discovered to my horror that I had a huge protruding chin which I then had a second surgery to shave away this unnecessary addition to what I had expected, after thousands more dollars in going back to Indiana to have this improved I did notice a positive change, the chin was no longer looking like johnny bravo. However 2 years later I look at the symmetry of my chin/jaw to how it was before surgery and have noticed that is bigger and more protruding on one side and also I have lost the v shape face I used to have is now more of a u shape and makes my whole face more of an oval shape rather than heart shape as it once was, this might be because I didn't have the money I opted for off the shelf implants which were too big for my face, no cat scans or any sizing methods were completed, and maybe that's what you should expect if your not paying top dollar but I had no choice.

I definitely feel I look better than before but I am now going back for a third time to have it shaved down more to hopefully bring back slightly the heart shaped face I once had before surgery and correct the difference in shape of each side.

I am extremely nervous about this third revision, I feel like I have limited knowledge on how this is actually performed whilst keeping the implant in place during surgery, I am also very worried about how the scar will look after surgery, as this will be the third opening of my incision of my scar under my chin which is already quite visible from certain angles,

I am curious and in desperate need of some advice as to whether anyone else has been through this surgery before? Especially the revision? Also has anyone had successful scar revision of a chin implant or jaw implant? What did the scar look like and how long was recovery? If so what procedures were best to remove the scar?

I have a horrible feeling that the scar might appear on my face after this revision rather than slightly hidden under my jaw, the information from dr.E has been very prompt but very basic, I am craving some shared experiences to help me through this traumatic experience!

I will update you on how surgery goes along the way, I am in no way dis regarding DR.e as a good surgeon at this point, I just feel very uninformed and very nervous because it's the third time

Thanks in advance