You're kind of freaking me out here. My dad tosses and turns, doesn't get much sleep, has to pee at night, wakes up in fear in the past often as I'd wake him up

You're kind of freaking me out here. My dad tosses and turns, doesn't get much sleep, has to pee at night, wakes up in fear in the past often as I'd wake him up after I'd come running to his room at night because I heard crazy sounds of him gasping for air. He generally doesn't get super-tired during the day though, but he's not super active anymore and drinks his coffee still. Anyway he's seen a doctor many times, mostly for heart/cancer stuff, but also specifically for his sleeping problems. But there was never this response that his life was in danger and that he needed studies done because it might kill him, while the healthcare system is quite advanced here...