Back of right hip in excruciating pain. Can’t walk

I’ve been having pain for days and limping and it keeps getting worse. To the point that i can barley get around. Get in and out of the car. Roll over in bed. It feels like something is slipped out of place. It’s not shooting down my leg. It’s a constant pain in the same spot. Anyone else experience this? Im 33 weeks. I have a pretty high pain tolerance so I feel like it’s something pretty severe to cause me this much pain. I’ve tried a foam roller, hot bath, heating pad, stretching