Pain in the right lower abdomen,loss of appetite and change in your
Stool color, requires further work up.
Green colored stool might indicate excess bile in the intestine.
You need blood tests including complete blood count
sonogram of your gallbladder
and a CT-scan ofh your abdomen.
X-ray studies of your small bowel may be necessary as well
Crohn's disease can affect the last portion of the small bowel
near the appendix.This has to be ruled out.Other infections
such as Tuberculosis
,Parasitic infections like amoebiasis
Hope this guides you to appropriate medical care.
Wish you well.