Hello! Pregnancy is 14 weeks and 2 days. There's no belly, it's comple…

Hello! Pregnancy is 14 weeks and 2 days. There's no belly, it's completely absent. But yesterday evening suddenly the belly became hard as stone. It's like a round thing. And this morning I have low stomach cramps, not that strong but then it lets go. What could it be? When did you see a belly?