Subtle movements when pressing around belly button?

Chantel

Don't mind my absolutely huge belly. I'm bloated like crazy right now lol 12 weeks and 4 days. I wanted to ask you all, why is it when I press around my belly button I feel sudden but slow movements. I 100% feel something moving and I'm thinking it's the umbilical cord but not really sure. Do any of you ladies feel this in your bellies as well?