It sounds like an emotional release. The liver holds onto emotions and the digestive system in general is connected to your emotions.
"my lips were shaky trying to suppress the cries. "
You should not be suppressing the cries!!!!! You have to deliberately get in touch with your emotions and engage in catharsis instead of suppressing the release!!! The Liver Flush is all about PURGING and RELEASE and the emotions go hand in hand with the liver!!!
CRRRYYYYYYYYY!!!!!!!!!! It is good for you. So long as you understand that emotions are healing for you and work on changing your beliefs associated with the feelings.