Have you ever considered fasting? Maybe pop over to the Water Fasting forum and see what they have to say. Or read through it and find some links to fasting books.
Also if you don't want to go to that, might you consider a drastic change in diet? Green smoothies and juice or raw vegan for a period of time?
Both of these suggestions are to facilitate general healing. In both cases, I'd suggest you read up first. Good luck and feel better!