@ryaskin I also had 2mm of retrolisthesis and that is why I chose a fusion over artificial disc when it was time for surgery, and because I worried about immune responses to metals in my body. My surgeon did a fusion with no hardware and I stayed in a neck brace for 3 months until fused. I did a lot of PT too and my therapist also did myofascial release which helps a lot. You may be able to put off surgery for a while with the help of physical therapy.