WHAT IS THIS FEELING...so sudden and new?

I am 12+3, measuring 13 weeks.

First pregnancy ended in mmc in April.

Today I felt the oddest sensation. I described it to my husband as “a bubble popped, but it rolled too.” I know that makes no sense. It was directly center of my belly. Under belly button by an inch or so.

Listen, I have plenty of gas. I know gas. I know it well. This didn’t feel like that. It was a bubbly poppy thing. It happened and then later again.

Could I be feeling movement this early???!?

Is it special pregnancy gas? I don’t normally feel it where this was.

What do y’all think? When did you first feel movement? What did it feel like?