Four ages now I've experienced serious punches/kicks to my cervix (the kinds that make you jump a little)... and I thought that was the "lightning crotch" ladies are referring to... 
However the last two days have featured a new sensation where it feels like baby is stabbing me in the vagina (TMI, sorry) with a knife.
Is this "lightning crotch"? If so, not fun!!!

However the last two days have featured a new sensation where it feels like baby is stabbing me in the vagina (TMI, sorry) with a knife.

Is this "lightning crotch"? If so, not fun!!!