Well, I deadlifted light today (up to 135 lbs.) and was supercareful about my head position and form, and I didn't get the electric shock sensations. That's the good news.
I did, however, feel very tentative at 135 lbs. (which is not heavy for me) because I felt....sort of unstable....in my neck. It's hard to describe, it's a sensation that something isn't right.
I'm just going to be very careful and tentative about lifting heavy. I had my trainer with me cueing me on form, so I felt safe, and we both agreed to stop at 5 reps at 135 for today.
But no L'Hermitte today! Yay!