I was on a thread about this a while back but sadly can't find it as my phone is not coping with the new mumsnet layout!
anyhow, i just wanted to update. So the pain below the right rib seems fairly common in pregnancy...ligaments stretching, ribs being kicked by baby, but now I am post birth and still suffering from nausea and rib pains it turns it is due to gallstones. apparently they tend to get worse during pregnancy so I just thought that anyone else suffering this should mention it to their Dr. I'm also told that you are most likely to get gallstones if you are the 4 fs - female, fair, forty and fat! (I am 3 of these!)