If your implication is that you might consider Catohlic doctrines heretical, yes I understand that, -- and of course in fact you did. The use of the term is problematic because it has not been historically used as such (it was always relative to the Catholic or Orthodox teaching), but it would not be offensive to me if you used the word. It means, simply, "at deviance with the established teaching". Insofar as you adhere to anything historically established, you could use the word, I suppose.
Scientists sometime call something heretical because it disagrees with the textbook.
TO say," I think that's heretical," is one thing. To spend time looking for new and creative ways to give offense and then sharing the results of one's research, that's quite another.
Some try to help us be better people. Others try to reduce us to our passions -- on a mission from God, of course.