Clary....I am just giggling away right now...at the image off something 'big and old and attached' that just won't come out!!! What an image! (not one you want to think about seriously!)
I don't know....you might just not have any parasites, Clary! Maybe invisible, bacteria-like ones... If you haven't even seen any EGGS (white, oval etc)...then maybe there is no big ugly guy in there.
How long have you been parasite cleaning for? And do those brown things come out only when you liver flush...or...? I know...I was thinking 'seeds' too...(maybe you have plants growing in you...heehee) but, like you said, why would they all whoosh out together....? very very odd.
BUT, if you parasite cleanse for a couple months and see nothing - you're going to have to feel parasite free, I think!