D.W.
That sounds like what labor felt like to me. Like one of the other moms here said happened to her, I had sensations like this for a while and then suddenly my water broke, and it wasn't til after that that I realized I had actually been having contractions. To me it felt like the baby was trying to stand up inside my uterus or something; it wasn't too painful before my water broke, but it was certainly very uncomfortable! Good luck with that little one, he or she will be here soon!! :)