I can't tell you which is best. Only you and your Dr can decide that BUT I would stick with the treatment the doctor prescribed, omit the pain pills, and use medical cannabis instead to see if it works for you.
I'm guessing that if you are going 4-5 times a day that it is mostly diarrhea. Medical cannabis may reduce diarrhea.
For me, it helps ease stomach pain and makes it easier to eat.