It is a necessary transition. Only after they have doubted does faith become personal and real. When doubt begins to raise it's head in our lives we cannot ignore it. Doubt that does not lead to serious inquiry is doubt that leads to unbelief. The first step to overcoming doubt is to take a good look at your own heart.
Some doubt is anchored in a real desire to know.
Jesus never turned away someone with an honest question. If so, help is available. Or is your doubt really a rationalization for sin. Sometimes doubt is really just unbelief looking for an excuse. He talks of her faults as the reason for the divorce.