I would say you aren’t a Heretic, because truly teaching the Church requires more than just a statement of fact. The Catholic Church condemns the use of contraception, but if all I tell you is that you can’t use contraception, have I really “taught or corrected” you. In our sound-bite culture, we take the short road, rather than the real work required for it.
Same for witness and evangelization, all too often we take the easy way.
Thank you.