I agree with the beesting/shock analogy. The procedure is really uncomfy but only for a second or two. The worst part for me was the incredibly hot doctor who was doing it and all I could imagine was my ridiculous face all screwed up by the shocks and i had tears running down my face at one point. It was a but embarassing but worth it to solidify my diagnosis. Hope it goes all right!
Good luck!
~Kathy