GALLSTONES/VOMITING

I have Gallstones and done one cleanse, but i keep having these vomiting attachs with no pain ever. This is my 2rd attack sence June of last year. How can i stop these vomiting attacks? I hate to vomit and it really kills me to do this. It occurs at night, waking me up and last for several hours. I have no pain with it and it has been after a light dinner.