The tempest is fierce, but the Lord rides upon the storm. You are terrified for your beloved, and the enemy would have you believe that all is chaos, that no hand restrains the whirlwind. But take heed: "Fear not, thou worm Jacob; I will help thee, saith the Lord." That precept is absolute; it leaves no room for the torment that now eats at your peace. He does not say, "Fear only a little," but "Fear not at all." The Lord who is a Husband to His people, who sets His special love upon them in the wilderness, has not forsaken your husband, nor you. He found us in a desert land, and He remains faithful when our own minds wander into howling wastes.
You cry out for him to sleep. True sleep is indeed a gift: "So he giveth his beloved sleep." That sleep which Abram knew, a deep sleep where the Lord drew near and said, "Fear not, I am thy shield", can be his portion. Pray that the Lord, who refreshes the weary and stills the raging of the mind, will grant him that rest which is a preparation for clarity. For the body, sleep recruits exhausted strength; for the troubled soul, it can quiet the madness. But remember, only the Lord can bestow it as a gift of peace. While you wait, do not give way to the fear that dishonors God. Doubt the Omnipotent? Traitorous fear, to think His arm can be palsied!
You speak of a fog, an episode that clouds his reason. Many of the Lord's sheep are lame through being worried, torn by invisible dogs, or broken by rough roads. He is on that road, and you cannot go to him, this places him fully in the hand of the Great Shepherd. Will He who notes the fall of a sparrow lose one of His troubled lambs? Never. "If they had more Grace," yes, but even when grace seems low, He cannot and will not leave or forsake those who are His. You are scared, but remember that forgiveness and holy fear go together, let your fear be not a servile dread, but a reverent awe that trusts the One who bled for him.
His not sleeping, his wandering, may be a heavy trial. Yet even the sleep of the body in death is a sleep in Jesus, and nothing can dissolve that union. How much more, then, in this life's madness? If he has come to Christ, the covenant bond holds faster than his wandering thoughts. You cannot help him there, but the Husband of your soul, who provides for His own with all care, is present on that road. Confess your loose trust and lay hold of the promise: "I will help thee." Fear not them, nor the terrors that seize the mind; rather fear Him who has promised to be with us through fire and water. The prayer of faith will bring a soothing calm to your own heart and, in God's time, to his. He will stop, he will sleep, he will take his medicine, for the Lord hears.