It is not unusual for even the most spiritual people to have their days of doubt.
Moses, on one occasion at least, was overwhelmed by his circumstances. After he had listened to the constant complaining of the children of Israel, he basically told the Lord, "I'm fed up. Just kill me. I don't want to deal with this another day."
Elijah, after his contest with the prophets of Baal on Mt. Carmel, heard that Jezebel had put a contract out on his life. He was so overwhelmed by his circumstances, so discouraged, so uncertain, and so filled with doubt that he said to God, "Take my life."
Even the great apostle Paul had moments when he was discouraged. He wrote to the church at Corinth, "We were burdened beyond measure, above strength, so that we despaired even of life" (2 Corinthians 1:8).
Jeremiah, the great prophet, faced it as well. He was ridiculed and harassed for giving out the Word of God. Because he was tired of the pressure he was facing, it made him want to stop giving out God's Word altogether. He said, "The word of the Lord was made to me a reproach and a derision daily. Then I said, 'I will not make mention of Him, nor speak anymore in His name' " (Jeremiah 20:8–9).
You are not the only one who has ever faced doubt or uncertainty, or has been perplexed as to why God did not work in a certain way. We may be in the midst of God's work and can't see the big picture as He can.