vagina pain

Emma
I am 31+3 weeks pregnant. For the past 2-3 days I've been having really bad pains on my vagina. It's constant all day, all day. Hurts when I move, stand up, walk and sometimes sit down. I feel the pain on my bones and it's excruciating!!! Any idea what it is? Could it be the baby is dropped and the process of thinking out and dilation will start soon?