So...this came out when you did an enema only? I wonder if you have had an itchy bum in the past? (that's a sign of maybe having parasites) hmmmmm...it definitely sounds like some sort of worm! Do you think that the reason it was brown was because it was filled with poo? (do they eat poo? ugh!)
I guess this means you're going to have to start a parasite cleanse now! And keep up the enemas...and keep a sharp eye out for eggs in your stool.