I'm 33 weeks along and at my 32 week appt the dr said baby was head down and her butt was just under my sternum and i would feel her kick up near my ribs. All of a sudden today i've been feeling BIG movements and in different places. Could she have flipped again? or may be sideways? how can i tell? This is not very comfortable. At what point do I become concerned about breech position for birth?