What is my ethicinity if I am ..?

It's not black and white (ha ha no pun intended). Ethnicity is defined differently by different people. If you accept the language group "Hispanic" as an ethnicity, or the racial group Latino (which is nonsense, because Latinos can be white, black, Indian, or some mix of those), then you would be a mixed Hispanic/Latino, Italian and Native American. But since there's no reason to accept Hispanic or Latino as an ethnicity, I would have to say that you are likely Mestizo (native American/Southern European) with possible African blood from Colombia or Ecuador.