Well, I probably won't chime in with anymore of the various scar treatments available since my colleagues have already done so.
But more importantly is - it sounds like your acne isn't stable at all, since you are still getting some chest acne and body acne tends to be awfully stubborn.
I would suggest seeking help, solve your acne issues first, then work with the same doctor whom you would have built some trust to decide on the best acne scar treatment modality.
Winston