It is clear that you have confused between IBS
and IBD. There can not be anything like negative for IBS, i understand that you meant IBD, a kind of inflammatory disease of bowel which includes crohns disease
and ulcerative coliis.
The ulcers in the ileum
can be anything from IBD to typhoid
, tubercular and fungal.
I may not concord with your previous docs opinion that you have overactive stomach because functional disorders do not manifest as ulcers. whatever be the diagnosis, fiber diet should help you and a trial of drugs for IBD is worth as you clearly seem to be suffering.
you need a Gastroenterologist
consultation for a good solution.
all the best.