anyone expierence this?

When your laying down in bed and like your vagina like inside feels kinda like it's really thin inside and it feels as if something's like moving it or rubbing it or something? I don't even know how to explain it but it just feels like something's lightly dragging something on it and it makes you feel like you have to pee? What does that mean? Is that just my bladder or..? I'm 37 weeks & 4 days so I'm kinda on edge sometimes 🙀