On the first flush I only saw some chaff and gravel.
I just did a second flush. All I saw was a couple pea-sized green/tan things and gravel. One looked like a hazelnut and the other was that bright green. Also, a lot of flaky looking matter with what looked like the skins of kidney beans (which I haven't eaten).
Doesn't seem like much. I'm thinking I don't have any stones.
After the first flush I did not get painful, swollen breasts before my period. I'm looking forward to see what happens on the next one.