Since you're having so many digestive issues, definitely check into bowel cleansing. Aside from reading up on the Bowel Cleanse page and it's FAQ and Forum here, another excellent source of information is Journey to the Center of Your Colon by Tim O'Shea over on The Doctor Within. Also, you may want to start adding probiotics to rebuild your 'good' flora and digestive enzymes to your daily regime. Oh, and read up on taking okra pepsin as well; it's wonderful for helping with all kinds of digestive issues.
In the meantime (and from now on, actually) diet is KEY to good health. What is your daily diet like?