Trekker: I have often "claimed" this verse by faith. By claiming, I do not mean in the WOF name it and claim it idea, but that it reflects God's Character toward His children. I then, humble myself in prayer, and beg God to show me mercy, and send me rest and sleep. He has, every time, but sometimes I would have to "pray through", and other-times it would take hours...but never days.
Sometimes my lack of sleep was directly related to sin that I had committed, and had lost His Peace, and had to repent, and look to Him to see me covered by the Blood, and be cleansed again...and then I rested. [ "No Peace for the wicked; type of thing.."]
Other times it has been pure Spiritual warfare; demon presence, attacking me to overwhelm my mind, and again, I could not sleep, but forced to pray...and Worship. There have been days where I have interceded all night, to survive so to speak, mixed with Praise.
There have been nights when I just drank too much coffee, or had taken pain medication that kept me wide-eyed almost all night. [ I broke my back in a car accident, with spinal surgery that failed..] During that time, I took a medication called "Trazadone" that really helped me [ Dr. prescribed]. It seemed to be very clean, and I did not lose the Presence of the Lord with use.
Now, I use wine, before I sleep, to relax me.
"Drink no longer water, but use a little wine for thy stomach's sake and thine often infirmities."
It does seem like a chemical imbalance type of thing...and I feel your pain, brother. I know the Lord is very aware of your plight, and He is using this for His glory and your maturity.
And he said unto me," My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me."
"Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong."
So, Trekker, I hope this helps a little...and if you would like, I will pray for you by phone. Include your telephone number at my mail:
ohhelplordjesus@yahoo.com
Peace and sleep be upon you!..brother.....Tom