I'm not too sure about the coffee enema at this moment for you I would start with a plain water enema and see how you feel. For the coffee enema, you have to use organic coffee. It's 4 cups water, 4 tbsp coffee normally. You must bring it to a boil and then simmer for 20 min then let cool. Of course you could always make a batch with 2 cups water and 4 tbsp coffee and then add 2 cups cold water to it, so it will be cooler, faster.
Either way, you'd have to do an enema first *(2 cups) and retain for 5-10 min, to ensure that you have the rectum clear, so that the coffee enema gets to your liver.* Again, I'm sure it may be of benefit, but since it's your first time, and you're experiencing so many things, I am not sure what to suggest besides the charcoal, Bentonite and regular enema.