Strange abdominal sensation...

Currently 25 weeks:

The sensation is more uncomfortable than painful. It isn’t low like round ligament pain. It happens higher up (maybe an inch above my belly button and directly in the center). It has happened twice so far.

The only way I can describe it is similar to when you turn your neck quickly and you get that weird “pop” sensation.

I have an OB appointment tomorrow morning so I will ask then but I was just curious if anyone has experienced this before.