I have hypersenstive or dull sensation (depending on the day) as I have MS. I have also had the electricity feeling down my spine but it wasn't painful. I'd describing it has more creepy than anything. Freaked me out to begin with then I got used to it, then it went away. MS is like that.
Don't think for a moment I am saying YOU have MS, I just thought I'd share my ESH so you get some replies. It sucks being sick!
I'm glad your going to the doctors too. I have a tendency to diagnose myself at times, after all my years of medical training. Doing this can be unhelpful to say the least.
Take it easy