This is the same thing I have with IBS but at other times have small pellet like BM with a few larger. Think its all a part of the problem. I seem to become constipated vy easily and am now on stool softener which helps, or Prune Juice may do the trick , both work for me.
PJ
You might look into this befor taking Cymbalta, or at least ask your Dr abt. it. I recently read, not sure where, just the other day ---- one of the newly found side effects of Cymbalta is urine retention. I don't know details but this info had just come out.
PJ