I was wondering that myself and looked it up. What I found was that baby can be laying on a nerve and that feels like vibrations...that makes the most sense to me, but I'm no doc...but from what I've read it sounds pretty common. ☺️

I feel hes movements but sometimes i feel vibrations and it kind of scares me

I felt mine vibrate alot. it's him moving in that water he is in my Dr said. plus my placenta is in the front so it is hard to feel kicks.

I feel the hiccups different

is it hiccups I wonder