Spoiler alert: No.
I was just watching a feature story on CBS where Brandi Carlile talked about her faith. According to the story, a preacher told Brandi he couldn't baptize her unless she could repent (of a sin of which she wasn't convicted.)
This led me to ask another more hypothetical question:
If I'm not convicted that a particular behavior of my own is a sin; and I never repent of it; and it turns out I was wrong, am I still saved? Answer: I'm still saved. I believe that with every fiber of my being - my brain, my heart and my body.
God forgives my errors. All of them. He is faithful even when I'm not.
Does that mean that I'm "off-the-hook" for examining my own life? Of course not! Self-examination is essential for every Christian.
In my opinion, a preacher's job is not to tell me what my sins are. A pastor's job is to show me the mirror of my Savior through which I can see myself clearly.