35 weeks pain/pressure (tmi maybe)

I just got up and starting getting ready for work. About halfway through I started getting this immense pain and pressure in the groin area. SO bad I was in tears and had to force myself to walk and it's still killing me. I know that the baby is low but even at 39 weeks with my other I had never felt so much pain. What could it be?

I'm not sure what it is but I'd be going in to get checked out. I hope everything is ok.