lot of people reblogging this identifying themselves in it so i wanted to give you a link to a more detailed desription of Non-24-Hour Sleep-Wake Disorder, and mention theres a similar disorder called Delayed Sleep Phase disorder where you are on a regular 24 hour cycle but you naturally get sleepy around 3-4am every day and wake up around 10am-12pm (roughly). as far as i can tell, despite the widespread nature of both these disorders, its basically impossible to get diagnosed bvecause sleep medicine is probably the single most useless specialty and if you dont have sleep apnea they dont want to hear about it.