Mother Teresa doubted. Martin Luther doubted. C. S. Lewis doubted. These are not lightweights. These are giants of faith worth following. They made their doubt work for them. They integrated doubt into their faith, and their uncertainty about God and the future deepened their faith over time. This encourages me. I hope it encourages you. If God did not want us to ever doubt, he could have ripped the book of Psalms right out of the Bible. God is much bigger than our doubts.
It is possible to have great doubt and great faith at the same time. The two are not mutually exclusive. In Mother Teresa, in Luther, and in Lewis we see that great men and women of faith can also be great men and women of doubt. In faith, there is room for doubt.