rr,
I too had these sesmae seed things. Not when I did my oxycleanse, but when I did daily enemas. I would notice stools, candida and what I called chaff - irregularly shaped small yellow bits.
They weren't parasites - at least not in my case. I disected several - not living.
Also they weren't anything I had eaten. I would be fascinated to know if you find out further.