I do not know what you mean by one gall stone. I am sure that you have many gall stones. Please visit the Liver Flush procudure on this site. Google Liver Flush and you will get many links. I have finished 11 flushes so far. I was depressed for a while and all docotrs gave me medications that reacted with me adversly. In one flush I felt better.
Every flush I do I get gall stones out, hundreds of them.
It just takes some prpparation. Also do not worry about bad tastes from Epsom Salt and olive oil. If it is hard to drink these things then drink it without breathing, that way you do not smell anything.