I experience pretty awful rib-pain off and on throughout the day/night. It is ranges from a dull burning sensation to feeling like I'm being stabbed. I'm pretty sure it's just the baby's position bc I can make the pain stop by poking baby until i feel him shift or (best choice) laying over the birth ball and doing pelvic tilts. And it's almost always on the same side (opposite the side baby has been laying up).
My theory is that bc of my abs of steel (I've been told by everyone who's had reason to feel them that they are freakishly tight), everything is just being really squashed and there's not much space not encompassed by bones to move in. My pregnant belly still looks about 20 weeks or less at almost 34 weeks. I've reached the point where everyone is concerned about the baby bc I look so small, even tho I am actually measuring right on track and babe was biggish at a 30-wk u/s. Ugh.