I need advice from an OBGYN. I am 29 weeks 2 days pregnant. For about a week I have been noticing mild pain in my vagina when I switch positions while sleep and when I get up in the middle of the night to use the restroom. Today, I started getting a very sharp pain down there, and it has been constant for about 6 hours now. The only thing that relieves me is lying down, and when I try getting up I feel the pain especially when I'm walking. Could you please tell me what this could mean?