The struggle you describe is a fierce one, and the cycle of sleeplessness feeding anxiety only makes the battle feel more exhausting. But you have made a crucial decision. In turning away from a substance that had brought you under its power, you are fighting for the very freedom your heart longs for. Many in the world talk about freedom as the right to do whatever they wish, but that path often leads straight into a cage. True freedom is something else entirely. It is the liberty of not having to reach for something to find peace, not because you lack the permission, but because you are no longer a slave to the craving. That is the freedom Jesus Christ secured for you.
You are learning firsthand that the things we once used for a sense of well-being can quickly become masters over us. You exercised a freedom to use, and in time, that thing assumed a power you never intended to give it. But the good news is that the Son has the authority to set you free from any chain, including the lingering withdrawal that now torments your body and mind. The secret to enduring this is not in discovering some hidden technique within yourself, but in discovering where your true strength lies. It lies in your separation to God, in committing your cause to Him. Your own strength has failed in the sleepless hours, and that is a blessed realization, because it is when we are weak in ourselves that His power is given room to move and to make us strong.
Right now, the valley you are walking through is one of weeping. Your body is crying out, your mind is in turmoil. But God intends to make even this dry and sorrowful place a well of refreshment. He does this by giving you His strength to go from one moment to the next, until you find that you are moving from strength to strength. You do not need to wait until you feel strong to approach Him. Prayer is the very place of strength. It is where David fled when enemies pressed in and his own resources were gone. In prayer, he called out, “Be not far from me, O Lord, my strength.” He went back to the promises of God's Word and found assurance that changed his attitude from defeat to victory, even before the full deliverance came. Let that be your practice in the long, dark hours. Fill your mind with the promises of His Word. He has promised to be your light, your salvation, and the strength of your life, so of whom shall you be afraid? He has promised to bless His people with peace.
The Lord will give strength to His people. This is not a reward for spiritual heroism; it is a gift for the tired and the needy. As you continue to walk away from the old dependence, guard your freedom jealously. Learn to love the freedom not to use those things more than you ever loved the temporary relief they provided. May God grant you the strength to endure until the fog of withdrawal clears. May He quiet your anxious mind and grant your body the sleep that restores. And may this difficult season prove to be the ground where you discover, in a way you never have before, that He is your strength and your portion forever.