I have several health issues, had my 1st B12 injection today, 5 to go then 1 every 3mths. I feel so ill, Ive had chronic pain on my right side where my lung since January, they have removed my Gallnladder in March then apendix end of July, but my pain is still there. Could this be due to lack of vitamin b1 and folic acid? I did ask the burse today but she did not know. Thanx all.