I'm pregnant, 15, 11 weeks along, I have pain in my lower left abdominal area, it feels like someone's inside me jabbing me in the same spot every couple minutes with a butter knife, sometimes harder than othertimes. I'm scared, I don't want anything to be wrong. It started when I steped up into my moms van and buckled. It doesn't happen after staying still for long periods. What could this be?