Hi welcome though I am sorry for what you are facing. Is that B 12 level after you started taking the supplement or before? If after your number could of been very low and I think even that number if before is. How long have you been on supplements? It can take a long time for repair. I am not an expert but have been to so many docs trying to find a why behind this. Are you on any meds for the pain? I wish I had more answers. Did you have your blood sugar checked? What about auto immune conditions? When did this start and were you exposed to anything or have you had an injury/accident? In your past did you have any health issues?