Oh my! I was just coming here to finally ask the same question!! I had a pain in my side that felt as though someone was pinching me with a giant wrench. And it was truly worse than the contractions. I hope somebody has an explanation. FWIW, I've given birth 2x and I didn't feel it the first time, so hopefully you won't feel it this time around. I went 25 hours of my 26 hour labor all natural and then finally got an epidural that didn't touch my contractions, but did numb the pain in my side. I think the pain in my side was impeding my progress because I couldn't move around. I had to lie on my side for hours because that was the only thing that helped ease the horrible pinch. And the hospital staff had no answers for me.