I have a very different and spiritual take on insomnia from personal experience. https://medium.com/know-thyself-heal-thyself/doctor-ramas-orders-stop-spirituality-writings-until-insomnia-breaks-9f977604b6e2. Essentially, find out what aspect of ones life is out of balance. I have the same take in writers block. One can’t write through it. One needs to find out what other aspect of their life needs attention and then the universe will lift the block