Also, at the moment most of bump isn't baby, your uterus only reached your navel by around week 20, everything above that is your other organs that have been pushed up and out to make room, so that stuff will also be a lot squishier. I also read that your bump can become bigger or smaller throughout the day/day to day depending on how much you've eaten and how tired your abdominal muscles get. I know if I've had a day of being up and about a lot my bump looks bigger as I just can't hold it all in!