Hi Bob,
Welcome to NT! I see that Alffe has given you the link to the PN forum. Lots of very informed and smart members there.
Have you also had your B12 checked? I know some of our members supplement with B12 and it has helped them.
Here are a couple links to some B12 threads
http://neurotalk.psychcentral.com/thread37542.html
http://www.paulgolding.id.au/THE_B12...Home/home.html
http://roseannster.googlepages.com/home
Please let us know if you need anything.