The photographs demonstrate a weak chin profile, also known as microgenia. A Silastic chin implant can be inserted to augment the mandible to balance the chin to the projection of the nose to help with facial balance and proportions. Chin implants are manufactured in a large variety of shapes and sizes, and can be inserted through a submental approach under local anesthesia as an outpatient procedure. For many examples, please see the video and the link below
The picture is consistent with microgenia. This can be corrected with an implant whose size and shape are based on your deficiencies. Your neck structures are very anterior giving a very short submental area. This may be fat or normal anatomic structures like your windpipe and voice box. If it is fat, it can be treated by liposuction.