Pelvic organ prolapse

Any mummies experience(d) pelvic organ prolapse? For me is like there is a lump/bulge at the opening of my vagina. Have yet to give birth and my gynae said it will go away after baby is out, but quite concerned that it wouldn't... Doesn't hurt if i don't bother it, but it's uncomfortable during intercourse. i guess i'm just looking for some reassurance that it will go back to normal after birth...