Dave I wish I had answers, but seriously, I would suggest trying a garlic enema. I am not suggesting it because I "read about it" somewhere. I have experienced great relief in the liver area by doing them.
I have done many plain water enema's in the past. The reason I stopped them is that I realized that although they do give some cleansing and relief of constipation, they also are pure water that is absorbed right back into your system, along with some of the toxins you are trying to clean out. That might be why you feel some relief, but then an hour later, as those toxins are put back in your system, you feel bad again.
You might have better luck with taking a Sea Salt or soap suds enema than just plain water. The infusion in the water makes it not be absorbed back into the system. Follow up with a quick warm water to rinse it out. It's been done for centuries safely.
I still think in your case, a garlic enema would help though. Good luck, hope you feel better, I know you are in a bad way right now.