My friend convinced herself that she had problems by the time three months rolled around after they started tttc. She was not charting. She had no evidence that there was a problem. Had she been charting, she probably wouldn't have worried.
I charted, and knew there was going to be an issue even before we officially began to ttc. If I hadn't charted, I would have wasted extra time.
Different strokes for different folks I guess.