Weird pushing sensation in my stomach

Jessica
I'm 17 weeks and 4 days pregnant. When I move or bend down in certain ways, I feel a strange pushing sensation in my stomach. It's mostly in my higher abdomen. This is my third pregnancy so I'm familiar with round ligament pain and this isn't anything like it. It's not painful, just alarming. I can't remember feeling it with the other two. Anyone feeling the same thing?