I have just finished B12 jabs and been told nothing more for 3 months but I feel just as tired if not more so. I had these symptoms for 2yrs before Doctors gave me the blood tests and before that I had pins and needles in my head and lost my hair so I am terrified that it will happen again. Where can I buy B12 injections. I returned to the Doctors this week and told him I have memory problems, and numbness in fingertips along with the extreme tiredness and he said there is no connection with B12 deficiency and when I said we I think there is he said its probably age but agreed to more blood tests. I feel so frustrated .