--I did give an extensive reply on the New Member Introductions thread you started:

http://neurotalk.psychcentral.com/thread148420.html

--which includes a link to our very extensive vitamin B12 thread here, which you'll find a the top of the forum page.

I'm sure others will comment soon, but I'm sure they'll say first, that your B12 level is way too low, and could account for a lot of symptoms; second, that you'll likely need supplementation for life, in fairly large doses (preferably of the already bodily-usable methylcobalamin form, in case you have any genetic malfunctions of methylation chemistry); and third, it's worth investigating why you are so deficient--do you have lac of intrinsic factor, have you had bariatric surgery, do you lose B12 due to another condition or due to prescription med effects, etc.