Just because you don’t sleep convential hours doesn’t mean you have a screwed up sleep schedule. It’s society and culture that says we sleep at night and work during the day as a general rule, and that’s what’s normal. Don’t give in to it.
Sleeping has only one requirement: Sleep when you’re tired. I was in the AF, stationed at Brooks AFB. Brooks is mainly a medical base that does different experiments. I voluteered for a series of sleep experiments. I was kept in a windowless room with reading materials and some things I was allowed to bring from my dorm room. I was not allowed to watch TV or listen to a radio, because they did not want me knowing what day or time it was. I was free to draw, write, read, or play video games (no antenna on the TV, so I couldn’t watch shows.)
At various times when I was awake, someone would come to the door and have me do some tests.
Aside from checking my heart and medical things, they gave me school tests to do. Some basic math, some algebra, geometry, reading tests to see how much I could remember after reading a paragraph or two, etc.
After the experiment was over, and I had completely lost track of time (I thought I’d been in there for a month, tuened out to only be one week) I was told how I did. At first, when my body tried to conform to the up all day, sleep at night dogma, I didn’t perform as well on the quizzes. After about a day and a half, I started sleeping at my own intervals, (which were roughly awake for 4 hours, sleep for 90 minutes) and they noticed a stark improvement in my time of completion on the tests, memorization skills, and a drop in my blood pressure.
So don’t worry if your sleep habits don’t conform to everyone else’s. If I remember right, DaVinci did his best work at odd hours and Mozart liked to compose around 3am.