Two months ago I was given a blood test because I was feeling extremely fatigued. The results were large red blood cells and a b12 count was 158. I was prescribed 6 injections of b12 to boost my levels which made me feel amazing. Now six weeks after I'm back to feeling extremely fatigued again but my GP refuses to give me another injection telling me I have to wait until 3 month after my initial injections. I'm very frustrated because I know what a difference they make to my life. Does anyone out there buy their own b12 injections and is it safe to do so? I look forward to any replys..