I wish I had information for you, but I also have had this happen. I noticed something odd floating in the
toilet after a BM... It was pill shaped, but bigger than any pills I take. I noticed it again tonight! :( I needed to know. I fished it out (don't ask, but I didn't use my hands...) Anyway, I used toilet paper to "break" it open (it was soft), and it was all white inside, like a pill...