A very good capture of what it's like to lie in bed and be unable to sleep. But you say you used to be unable to sleep. Thinking of your earlier post today, now your sleep is better? Because your thoughts turn off unless you deliberately turn them on? Hey, do you dream?
I had trouble sleeping most of my life, but the last ten years, it has been okay as I upped my workload and then, started writing on top. The switching off the brain might help also, but the improvement predates the stroke.
I do still dream, but it is far rarer and less vivid than before. They also seem less complex.