Same here. I had the same issue with my first the bigger she got and now my 2nd (same side) nearing the end. The just shove their little feet in my rib cage and my ribs just ended up bruised. They were bothering me weeks after delivery with my first so assuming it'll be the same this go around. But yes, sitting, sneezing, it all makes it ache. It's probably just baby's constant pushing and kicking on them. :/ it hurts but it'll be over soon:) good luck!!
Thx for the info! I was worried I was something way worse!