For Christians: What if you're wrong?

Yeah, I know all you guys are absolutely certain you're right and all. But just imagine for a moment that some other religion ends up being the right one, not yours. You would have wasted so much of your precious time on earth, denied yourself so much freedom and so many experiences, living your life according to a lie. Does that thought ever cross your mind and prompt you to question your blind devotion to something that's totally unprovable?