How do i know if i have delayed sleep phase disorder?

Chk DSPD signs below: Delayed sleep-phase disorder (dspd), also known as delayed sleep-phase syndrome (dsps), is a circadian rhythm sleep disorder affecting the timing of sleep, peak period of alertness, the core body temperature rhythm, hormonal and other daily rhythms, compared to the general population and relative to societal requirements. People with dspd, equally distributed among adults.