Everything you get out is better out than to keep it inside !
Just enjoy the fact that things are coming out!
Nobody can tell you for sure what you have inside of you, or how old it is. Some Gallstones or some particles inside gallbladder sludge can be formed within 48 hours, others may take months or years to form !
And, if things are getting out, it is definitively a good thing, there is no way it can be a bad thing.
Enjoy your success !
Physical exercises, regular physical activity can prevent Gallstones formation.
Natural lecithin and choline in diet may help prevent Gallstones formation.
Drinking enough water helps too.
Consuming enough good fats helps too.