I am 24years of age and have been diagnosed with b12D and just under going the loading doses now. I caught glandular fever and as result of having bloods found out about my B12. I do not know which symptoms are connected. I have been having aches and pains in my arms and legs and thought it had gone away but it's now back again. Literally feels like sometiming is moving down my arms. The arch of my right foot seems to be constantly numb and have a cramping like feeling. I don't really know what to think anymore with it all. Just when you think your on the mend your back where you began. Does anyone else experience anything like this?