If you do more flushes, you will probably find out. Just don't eat any tomatoes for a few days prior...
Not all parasites or stages of flukes look like that (rolled up tomato skins). The ones I saw coming out of me looked different. They looked more like furry tadpoles. There are lots of different parasites in different stages of development.
For me, taking the Black-Walnut hull combo was the clincher... After about a week or 2, I started passing alot of whatever they are. I think I must have passed a couple of hundred.