You should correct your diet so you stop producing new stones.
You should flush every 2-4 weeks until you're stone free.
Nothing but calcified stones show up medically. A rush to the ER, they told my mama "no stones, just a grossly enlarged gallbladder, let's take it out." They put 3 stones in a medicine bottle that were more than 1" in diameter and told her that was all they could get in the jar. SO MUCH FOR NO STONES, JUST A GROSSLY ENLARGED GALLBLADDER, huh?