These may be flukes which have a red to brown color. Some people have a difficult time killing off the flukes - they have to be persistant using a variety of herbal treatments and some people eventually use a combination of drugs. For more advice post on the parasite Support Forum for herbs and the Parasite: Drugs Forum for meds. I've been killing off flukes for years but the only time I see them come out is when I do parasite herbs followed by a Liver Flush. I have used H. Clark's 3 herbs with a Zapper and stay on the maintenance program. I've also found that Quassia, Epazote, Hoarhound are good at killing flukes.
Itt is possible that something you ate is staining a different parasite orange. Turmeric might do this and I think that Humaworm has turmeric.