I was in hospital for surgery in January and after the surgery, I went 9 days with a total of 15 hours sleep. I genuinely thought I was going to die towards the end and my heart rate was all over place.
I don't know how insomniacs feel but the last 4 nights, I was given zopiclone and even that didn't work. The feeling when the zopiclone started kicking in but my body still didn't fall asleep was terrifying. It was hallucinations and palpatations with lots of dizziness.
How anyone sleeps on hospital wards is beyond me. I finally slept once I was discharged on the 10th day but it took me about 2-3 weeks to feel normal again.