what pain am I feeling?!?

I am 38 weeks pregnant... randomly and sporadically the past few weeks I've been getting excruciating pain, it goes through my lower abdomen and sometimes shoots out my butt almost... if I move it gets even worse so I have to lay in a ball and breath until it goes away... some of them have even urged me to push as if I have to poop. What am I experiencing? Im a FTM