***What is this, symptom???***

Okay, I've had 3 choldren already and never felt this before...
I'm sitting on the couch, completely reclined so I'm not doing anything to put stress or weight on anything. I have this sharp pain right at the top of my vagina, it starts in the middle and goes to only the right side. And it comes and goes like a contraction would but I'm not having any contractions??? It's literally on the top not like lightening crotch.