Hi I'm needing advice again . I'm exhausted and cannot concentrate at all . I feel floaty and not with it and have to keep reminding myself of what I'm doing I aching muscles and find it so hard to even get up stairs . My main concern is my low mood . I know before anyone asks I was doing fine on weekly injections until doctor stopped when my levels went up to 2000 from 200 in 4 weeks but these stopped in April. I suspect my levels have dropped considerably since then . She will not listen to me re my symptoms and I'm feeling hopeless . I received info re self injections and will proceed with this shortly . At the min I am taking 2) 500 Mcg a day of b12 is this enough and also do I need to take folic acid I have a cheap brand in the house can I go ahead and take . It is valuepack folic acid . Will this help my low mood ?