Hi.
Thanks for your query.
Noted the history and understood your concerns.
Dark green watery stool is indicative of an intestinal infection which in turn can give rise to pain in the pelvic area.
Hence I would advise you the following in such a situation:
Get the stool tests done.
Tests of blood can help for
WBC count, electrolytes and anything like for
diabetes and others as decided by your Doctor.
Clinical evaluation and examination by your Doctor as well as correlation with your reports and get started on appropriate antibiotic,
metronidazole and probiotics along with symptomatic treatment for pain with antispasmodic and supportive treatment in the form of a PPI like
Omeprazole, electral solutions, plenty of oral fluids.
All these should help you to well soon.