I am curious to know what others think, but to me it looks like parasite debris. I have passed a whole lot of stuff like that in 12 years.
Peggy is right according to what my mother has read that if it be a Tapeworm that the head must come out before it will die. The chances of that are slim without some kind of help.
I wonder if the head of this freaking worm is living in my tailbone because of the swelling, activity, pain and torment I endure in that area.