Help!

Hey ladies! I’m 33 + 4 with twin girls. I’m having some extreme pelvic pressure in my vagina and my butt. Is this a sign of labor? I’ve had it for a few days and it’s just getting worse. I feel like I have to poop constantly because of the pain and pressure and when I do have to poop, I feel like I’m going to break my water bc there is so much pressure. I need advice please.