You know your body better than anyone else. If you think there is a problem get to another NERUO surgeon. You are still having some neurological problems. I remember that pain very well. Hope that the doc. can address your concerns and figure out just what is wrong.
The facet block can help, but it is only temporary. I declined most of the injections as they were a bandaid only. I had Ketamine infustions before my last spinal surgery.
Your scar, sounds like it isn't healing right. For me within 6 weeks, it looked good. I had internal stitches that really blended in with the creases in my neck. Maybe you should go in, and make sure there is no infection.
I am here to listen anytime. I hope sincerely, that you can get an answer, and maybe some better pain control. Be assertive, as you are your own best advocate with the doctors. you are in my thoughts and prayers. ginnie