Thank you for the query.
It is hardly possible that probiotics could cause white stool and abdominal cramps. Most likely you do suffer from bile ducts obstruction due to gall stones
. Especially if the pain is located in the upper right abdomen, radiates to the back, you do have nausea and the urine is dark.
I suggest you to visit your doctor and have abdominal ultrasound
, blood work, liver tests (AST,ALT,GGTP), amylase, bilirubin
and urine analysis.
Please do not wait as if this is really bile ducts obstruction in some cases it can lead to acute pancreatitis
Hope this will help.