When I have had a detox bath I do see what seems like very tiny bubbles coming out if my skin, I guess these are the impurities being drawn out.
I havent seen any worms in the tub after though, if they have come out as eggs and hatched that is a good thing, at least they are not in you anymore!!!
Try not to panic too much, when we cleanse we see all kind of things come out, it is most likely that you and your child have parasites but you know that now and have started getting rid of them.