You already got good answers I just want to add, that 1 tbs Epsom Salts (magnesium sulfate) in water usually gives relief in 15-20 minutes and you can repeat it, though it my give you the runs.
This is only a bandaid for now, it is not a cure.
Start flushing to clean the liver and gallbladder and also to prevent new stones from forming. When you already have these problems it means that your body probably will keep making them and things will get worse.