Hi Junie~
I've had a NCV done and I didn't consider it "extremely painful to the point of screaming". It was a little uncomfortable, and once in a while there were stronger zaps, but I never even thought about screaming. Of course everyone's pain tolerance is different.

Try not to worry about it. I heard horror stories about every test and injection I had. Maybe they did me a favor, because I was expecting to be half-dead, and then it wasn't so bad.

Hang in there and let us know how you turn out! Take care!
Hugs,
Jan