I have been getting those "stabbing " pains down there for weeks now. Usually when I am up walking around. My doc said it was just your body preparing for labor. it doesn't necessarily mean it is comming NOW.
It really depends, how far long are you and exactly where are you feeling them "vagina" is very broad term. Do you mean the outter or inner labia, the vaginal walls inside the vagina or in the area of the cervix?