This is my second little. And I'm about 37 weeks. My first was born at 38 weeks. However labor was so fast and intense I just remember how bad it hurt. Waking up pooping and knowing it was time. Yhins time around has been a bit different. Bad back pains that shoot down my groin during a contraction. Was up all night with them. Thought for sure he'd make an appearance today but they subsided. Any experienced mom as who can tell me if that's back labor or the start of it?