I have had the conductivity test and it was normal. My GP didn't even phone to tell me.
After four weeks on the oral B12 at 2mg a day my symptoms started coming back so I got a vial of injectable B!2 and started doing it myself. After two weeks symptoms are reduced again. Looks like I may have to use the injectable B12 but will try holding the oral one under my tongue to see if this works. It sure is scary when the symptoms come back. I really freak out.
My GP still denies it is B12 but I have seen two other GP's in clinics for injections that are more understanding. Out of six medical people in the last six months two understand PN and B12. There must be a lot of people misdiagnosed and suffering terribly.