Display Morei dont know how valid that is as an excuse
i sleep at 3 or 4 or sometimes at 6 in the morning on free days but it never bothers me to sleep early when needed
you just need to try at first instead of ruling away the possibility
also, as i said, limit your sleep to only once a day and spend an active lifestyle so your body gets tired and wants recharging
i have anxiety and too used to it
but anything can happen as u know