Hi - my B12 serum levels are high because I was supplementing both orally and had injections (Hydroxy) whilst on holiday in Australia. I think that I have always suffered from low B12 and just self medicated with injections - in South Africa it was easy to go to a pharmacy or Doctors rooms and ask for a B12 plus B complex jab whoever I felt really low, very stressed, anxious, depressed or very tired. I have a cracked tongue (from my teenage years) and it is always a bit sore. Since living in the UK my symptoms have got so much worse. I also have muscle weakness - a duvet and blanket feel too heavy to lift off me. I am also having trouble walking although not sure if it's related - because I do have dodgy knees and ankles anyway but my muscles, knees and hips are so sore it's hard to get up out of bed or a chair - I feel like my bones are bending when I stand. I am a big person and have always been considered as the strong one - now I am having to ask people to do things for me - can't work at present so that is stressing me as well. Does anyone think this could be related or should I look at a different angle?