My movements have felt pretty much the same the whole pregnancy.
There is a large round lump on either the right or left above my bellybutton. I think that's the baby's butt. I feel a hard mass where my bladder used to be, I think that's the baby's head.
I feel tiny flutters on either side of my hips, kind of deep inside, I think those are the hands, and lots of kicks and rolling movements up above my belly button, the whole way across.... I think those are the knees and feet. My baby switches from LOP to ROP a lot, I think. But always nicely posterior. :P I don't feel a long hard curve anywhere, and I think that's cause the back is to my back.