I am worried after reading about this very rare disease (Fatal insomnia). I was just wondering if I sleep about 7-8 hours a night (maybe with 1 or 2 wake ups in the middle of the night) I feel like i haven't slept at all. Sometimes it's a groggy feeling, other times just feels like I never went to bed. It's weird, but I'm not sure if it's related to stress because I have been having fatigue problems for past 2 months and it just wont go away. Been through various tests such as blood tests and a sleep study. Sleep study came back perfectly normal but I am not sure if sleep studies can verify fatal insomnia. Just worried and wanted to know if you can still sleep but not get restorative sleep and still have this disease.