My back pain hit me about 3 weeks ago. It was not lower back though. It has been across the rib cage at the back mainly the right side. I first thought my back was out so went and got an adjustment and of course it was out so was a few ribs (never happened before) but makes sense as that is wear the discomfort is. Not even a hour later it was back again, so 2 days later I went back for another adjustment, more ribs out! (what the?). Ok lets try remedial massage. I have had 2 of those now which hurt like crazy but I toughed it out certain that it would solve the problem. Nope, still uncomfortable and mainly when I am sitting in car or on a chair. I figure that because I am only short that everything is pushing up into my chest cavity making my ribs and muscles in that area stretch and due to a nasty car accident some years ago where the right side of my back was damaged this side is not giving into the movement very well. I find myself leaning up against a corner of a door or wall and rubbing or just standing up for a while. Heat is awesome, what a relief when I am stuck in the car for a while.
So far this is my only complaint, other wise I love being pregnant!