I began loading shots of B12 in mid November, 3 shots a week for 3 weeks, some of my symptoms began to improve, muscle spasms in legs, pins and needles, feeling like I was walking on jelly. Cut down to one a week over Christmas for 2 weeks and then relapsed! Went back up to two shots a week since and have made same improvements again. However my hamstrings that sufffered the worse spasms have not regained their full flexibility ('m a yoga teacher and was previously very flexible), a groin strain that I had just before diagnosis is very slow to repair, and both my deltoids are complaining a lot, left side being worse as I also had a minor injury to it. Is it possible that the injections in to the deltoids are causing trauma that is slow to repair - do others have experience of this? I'm also still getting a lot of trembling when doing anything strenuous with any of my muscles, and they are all slow to recover from exercise. It may be that this is normal, but I'm starting to wonder if something else is going on as well. Can anyone reassure me?