JrbrMommy - When you dream of an object, such as your liver, it seldom refers to your actual liver - for dream images are almost always referring to something else. So being sick is not actually about vomiting but about your inner world activities. In this case it is about something you have been building up inside you that your being - the life process in you that keeps you alive - wants to clean out of your system. But your system is referring to the attitudes and emotions you have cooked up inside you.
The liver is the great factory and alchemist of your body. It stores, it transforms, it detoxifies, and in fact it has 500 functions that are vital to health.
If you imagine yourself back in the dream when you are puking up the rest of your liver, and play it over and over with the question - what the hell does this mean? And don't try to think what it can be, for if it works it will come by itself.
But you can try the following - -
http://dreamhawk.com/body-and-mind/methods-of-awakening/#VoiceTony