Tummy feels so heavy😫

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I'm 23w+3d & my tummy feels sooooo heavy. I know it's just Baby but it literally feels like I'm carrying a good extra 10 pounds just in my tummy area. It hurts to walk. I actually haven't gained a lot of weight since being pregnant. I think the last appointment I had doc said I only gained 5 pounds in these entire 23 weeks. Anyone else having this?