My husband will literally say "I'm going to sleep" and go to sleep. It can take me up to 8 hours to fall asleep while I toss and turn and fight panic and depression. However, I did get to work night shift for awhile, and realized that when I go to bed at 8:00 am I can be the asleep in 10 seconds person! I miss night shift. Instead of being tired and miserable all day and laying awake all night except for a few hours of fitful sleep, I slept like the dead for 6-7 hours during the day and felt absolutely alive and awake and happy during my waking night hours. Apparently my circadian rhythm is flipped and so when I try to live "normal" hours my brain responds by sending me into a spiral of doom and worsening mental health.