Hey Mel, I don't have the rib thing yet although have felt the odd twinge there. However I did have it really bad with my daughter, everyone kept telling me it would be her foot wedged in there (no idea if that's true or not). The only thing that seemed to help was that I regularly saw a chiropractor and they would put pressure on your rib cage which opened it up more and gave baby a bit more room I think. I know what you mean about it not being bad enough to be off but still pretty distracting! Hope it improves for you x