I had parasites about a month ago I had treatment and no more parasites.  When I had the parasites sometimes, not often I would pass a small  red triangle  some thing.  No parasites for two months but an occasional tickle in my anus.  This morning I passed one  of those (very small) red, triangle  things, I have searched the internet but can not find anything close to what I am describing  What are those small perfect shaped triangle things?