I had symptoms of what I thought was GBS onset as well.

I went through some similar things that caused my legs and hands to go tingly then numb and movement basically stopped at the same time. Though the NCS showed normal or at leeast better then they were when I first got GBS. It is thought what happened is just residuals, this baffled me at first because it affected areas that had previously been unaffected.

Recovery is slow as theey refused to do IVIG or anything else for that matter but I have gotten my hands back for the most part aside from some weakness. Hope this helps. Take it easy and get lots of rest as you will soon find out you will need it more then ever.

Sonja