Yes, a lot of this is going to have to do with a lack of stomach acid. The Prilosec just makes things worse. Here is some reading for you to start with that will give you a lot o direction:
http://curezone.com/forums/fm.asp?i=1489655#i
http://curezone.com/forums/fm.asp?i=1581539#i
http://curezone.com/forums/fm.asp?i=1541927#i
My recommendation is to focus on your stomach acid first, especially with the bitters. And build up your adrenals and intestinal flora to get your immune system up.