The effect can be spontaneous for a few days but overall gradual.
I am assuming you have changed your diet and looked into probiotics
etc. Gassiness could be lactose intolerance, it was for me.
Be your own detective, experiment with what works for you. I am only aware
of Southern Belle posting that she got stone free. Be aware of what you
are doing and how it affects you. And body health sometimes seems to come and go.
I got weird black small pebbles from my sinuses three days after my fourth flush.
Try to enter jokes in google search - there is a weath of laughter available.
Good luck and happy holidays.