Should I be worried? Ok I know your gonna say no but I am! I'm confused what I'm looking for how long it last etc. Sometime I think Oooo was it then its like prob not I don't get the 'it feels like popping' because theres so many other ways people describe it. When do you feel it move? I was told lying down trying to feel it move was hardest - True? How long would that sensation last?