Today I have such a strange feeling, I've never felt anything like it …

Today I have such a strange feeling, I've never felt anything like it before (and it's still early). Like a baby is moving around. But today it's slightly above the belly button and from that side there are movements as if something is happening inside, I thought maybe gas, but no, like something is moving inside, but I think it's definitely not a baby because it's too early and plus the heart beats below the belly button and it can't reach there. Has anyone experienced this? What could it be?