My Vagina!!!! Lol

Lol I've been having this type of pain inside my vagina or cervix or whatever. I'm 37w3d and when I get on my hands and knees or bend down or and sitting with my legs almost criss crossed the inside of my vagina feels like its pulling or opening or something. Idk how to explain what it feels like. But I tried explaining it to my obgyn and she really didn't know what I was talking about..she said that its probably normal..but when I bend down I feel like the inside of my vagina is ripping open and my baby might fall out. Anyone know what this is or have something similar happening??