I am an avid opiate user. I have a pain on mu right side underneith my ribs. And the other day I had a white bowel movement. What could be wrong? Help

Liver problem. Right sided chest pain and white stool can be sign of liver problem such as hepatitis a, b or c. Last 2 types commonly associated with intravenous drug use. Se your doctor.
Opiates with . Acetaminophen? Pain in the right upper quadrant and alcoholic stools can be a sign of liver disease. See your doctor right away.