TMI - toilet talk

So, I'm nearly in my 34th week, and I've never been constipated (yet) but the last 2 or so weeks it's been more really soft than anything... I'm drinking lots of water and am not dehydrated from the softness, just thought constipation was more of a problem later in pregnancy where as I seem to have the opposite? Not that I'm complaining, I feel well overall, just weird that it's like that? And also heard it happens before labour? Haven't changed my diet or anything.. Anyone else the same?