Your bloated stomach might be a symptom of a large adult or colony of helminths: Roundworms (Nematodes), Tapeworms (Cestodes), Flukes (Trematodes).
It can also occur in Protozoa (single cell) infections.
To make matters even more confusing, especially for folks who haven't done a lot of research, co-infection with differenet types of parasites can also occur!#?
Co-infection happens when the immune system becomes so overburdened in battling one type of parasite that its weakened defenses are unable to stop the invasion of other species & pathogens into the body.
You didn't describe other symptoms or details of "things in the toilet" that you've seen after cleanses.
I suggest this protocol to folks who highly suspect or have seen evidence in their stools of different types of parasites (roundworms, tapeworms, or flukes). My recent post on this subject: http://curezone.com/forums/fm.asp?i=2092860#i
Good luck in your battle! And keep the forum posted on your progress & other questions that you may have.