Lenore, I had a very unusual onset as well. I've always had tingling, especially in my left foot and leg. It's like the sciatica nerve is just freaking out. Not a lot of pain, just tingling and buzzing. Nothing showed up in the MRIs or NCS to explain it but the doctors think it's just part of it, for me. My symptoms still are dominated by pain. Sometimes I wonder if I can only walk a short distance is totally related to weakness or is it the pain in my ankles and knees. I do see atrophy around the joints so maybe the pain is from the lack of support. All I know is that it's the most complex puzzle I've ever come in contact with.
That's one of the reasons I'm trying the natural approach with therapy, including diet and supplements. My RT came Friday and told me to keep doing whatever I'm doing. I don't know if what I'm doing is making any difference but it feels right for me.