My sleeping schedule is so messed up

Yesterday, I woke up when someone called me. I picked up the phone, but, as usual, they hung up already. It was dark outside, and I looked at the clock, which showed 6:00. I thought, what a bastard, calling me at 6:00 AM.

Then I realized that I had slept at 9:00 AM this morning.

I proceeded to sleep another three hours, giving me a total of twelve hours of sleep.