Good luck with it. Specialties likely to be helpful include hematology, endocrinology, neurology, and rheumatology, depending of course on what is found along the way.
Thanks so much for taking the time to try to help.
I have kept a food log and could not find anything in common. I have seen a GI specialist and he was at a loss. I do plan on seeing more and more people to figure this out. the pain is to intense to give up!
Lots of possibilities come to mind, from food allergy/intolerance to porphyria (in particular acute intermittent porphyria). But you've already seen some specialists and ruled out some possibilities, so I don't know what might be causing your symptoms.
You're going to have to start seeing physicians to figure this out. If you have a primary care physician, get a referral for a specialist (a GI specialist as a possible starting point). You may have to keep seeing doctor after doctor, ruling out one possibility after another, before you finally find the answer. Abdominal pain is a very general symptom, as are your others. So patience and perseverance. And I suggest keeping track of each attack, noting date and time, what you ate, drank, and did during the preceding 24-48 hours, and how the attack evolved and resolved. That information may help speed up the diagnosis.