I am a GI doctor's nightmare, but this is information I have garnered through my experience and research:
IF
you have foul-smelling diarrhea that floats, with bouts that come on suddenly
you have intense abdominal cramping with feelings of being feverish, nauseated and sweaty
you have nasty smelling gas with bloating
you are very tired, fatigued and have no energy
you have an elevated CRP and low iron
You could have Celiac Disease. It is an intolerance to gluten found in Wheat Rye Oats or Barley, which causes damage to the upper part of the small intestine. It is a very serious condition, but is treated with a strict gluten free diet for life. The treatment is difficult at first, but the nice thing is that you never have to have surgery medications or additional treatment. It is diagnosed by endoscopic biopsy.
In your case, it sounds somewhat like Celiac Disease. There are other conditions such as Irritable Bowel, Crohn's Disease, or Ulcerative Colitis. Honestly, I think sometimes Doctors like to call things irritable bowel syndrome, when in fact it is something else.
I hope you find the answer you are looking for. Please keep us posted as to your progress. If it does turn out to be Celiac Disease, please let us know, as I can give you a lot of helpful info on that.
Peace.