whiteclover, that depends on how far along you are and whether your uterus has risen above your belly button. If it has, then what u feel could be baby's movements. Can check online for rough guide on when uterus moves up above belly button level.
bbshower, you're so cute! Umbilical cord became fallopian tube, hahah... No, I don't think it's connected to our belly button, lol. The cord is within the waterbag, and shld be connected to the placenta.