Thanks for the query
It looks like you are suffering from melena (which is blood in stools) which is the reason why you are having black stools. Please follow these suggestions
1. Get a stool for occult blood done to confirm the diagnosis
2. Approach a physician for a complete blood count
, it is important that you approach a docto.
3. Tab Butylscopalamine is a good drug for the pain, you can take two per day for 3 days.
4. Ultra sound
abdomen should be done to see what is the root cause of the pain. If nothing is present on the ultrasound
scan then I suggest a CECT abdomen
I understand that you cannot approach a doctor but ignoring it might further worsen the situation
I hope I was of help