So now that I'm getting further it's been a few weeks since I've had constant achy pains in my lower abdomen. For the past couple of days not only does it feel achy on my sides by my hip bones but I can't stretch really. If I do something like roll over or try to stretch out a sharp pain shoots down my side. My tailbone also hurts! I'm not sure if that's related or not. Maybe just growing and stretching you think??