We question God's plan all the time. Why? Must we control and see everything? The answer is No. When that doubt appears or seems to be nagging in the back of your mind, stop think, review your blessings. If you are doing Gods work (which you should be doing everyday) do it with more intensity. You may need to get down on your hands and knees and literally repeat "God I know you have this." And" God I know all that has happened and all that will happen is in your plan." Repeat, repeat, repeat.
James 2:20-24 Do you want to be shown, you foolish person, that faith apart from works is useless? Was not Abraham our father justified by works when he offered up his son Isaac on the altar? You see that faith was active along with his works, and faith was completed by his works. The Scripture was fulfilled that says, Abraham believed God, and it was counted to him as righteousness and he was called a friend of God. You see that a person is justified by works and not by faith alone.