I'm going on 18 weeks pregnant. Everytime I orgasm, my lower abdomen gets hard and it feels like one of the babies moves down there each time. Like, you can rub your hand over the lower left abdomen and it feels like a baby there, and who knows, maybe it is or maybe it's just cramping but it doesn't hurt. It honestly feels like a baby. But if it's not, should I not be having sex? I can't get in to ask my Dr. until later this week.