This neck/arm/hand thing has been feeling better for the past day or so. The pain is down to a dull ache most of the time - much better than the roaring pain I had been feeling for the past three weeks.
I actually sat and stitched for a bit last night. It was really weird holding a needle with a numb thumb, but I managed a couple of rows of stitches and it felt like a huge accomplishment. Heck, just sitting here and typing this seems huge, too!
Maybe I'll be back to my normal and idiotic post-writing self soon.