Aging Significantly

I have only had work for a week but I have become an old person. I now go to bed at 9:15 and wake up at 5:15. This weekend when I could stay up late and then sleep in, I could only make it til around 11 before falling asleep and then naturally awoke around 7AM. This makes me sick. Also, yesterday I was a responsible adult and spent a large part of my Saturday running errands and cleaning. Ugh. I need to do something REALLY immature before I explode.