Tmi: Pressure and pain in vagina 31 weeks?!

Kendra • Happily Married!! Two beautiful little girls :)
I'm 31 weeks and have been getting this awful pressure in my vagina for awhile now it's really feel like a rock down there or baby is about to fall out but today I been getting sharp pains of i move or spread my legs the wrong way. Is this normal? What is it?