Hi,
I have had a Leep before and I my bleeding and super weird discharge didn't start for awhile after the procedure, in fact, way longer than I expected.
Anyway, I posted a question on here a few days ago so I keep checking in. In the meantime, I have become a Google Master! - looking for answers. I recently saw an article referring to something like you are describing called an " eschar ", a kind of a scab of cells of the cervix sloughing off 5-10 days postop. Though I didn't see the size of yours indicated it might be a term worthy of your search Try looking that up while you wait for an anwer.
Take care~