What kinds of doctors have you seen? If you've had workups for ulcers, maybe the appendix, your kidneys, and other obvious guesses, do you think there is something you might be getting in what you ingest that is giving you this?
Here's a more complete list of things that can cause stomach pain. You say you've "been through every test there is," but it doesn't sound like it, or they would have found out what is wrong. In your shoes, I'd talk with the doctor about each thing on this list, to make sure every one of the possibilities has been looked into.
Irritable bowel syndrome (IBS)
Crohn's disease or ulcerative colitis
Urinary tract infection
Pelvic inflammatory disease
Gastroesophageal reflux disease (GERD)
Abdominal aortic aneurysm
Inflammation of the gallbladder
There are also a lot of different kinds of abdominal cancers that can cause pain, but it doesn't sound like the pain would be sporadic as you are describing, but would be more likely to be constant.
Yikes - No - they have not spoken to me about these things. I will make an appointment and take this list.
Thank You so much Annie. Very much appreciated.