To Write or Sleep?

That's the question I've been wrestling with these past couple of months. I'm a one hundred percent night owl. If it were up to me, I'd stay up until about 3am every night then sleep in until about noon, but unfortunately the world isn't on the same page with me, and I'm forced to adjust. One of the most difficult adjustments is with my writing. In college, where I've written my best work, I'd have the liberty to stay up late and sleep in (okay, so I'd skip some classes sometimes to sleep in, but who didn't?) But now I have to wake up early for my job, so I'm not able to take advantage of my most creative window of the day, 12am-3am. I still get my most creative story ideas around that time of day, usually when laying in bed a story will play itself out in my head, plot, characters all the way to the ending. I'll even have some paragraphs written out in my head and I'll swear that I'll write it all down when I get some time the next day. That free time doesn't usually happen until the evening the next day, around 8pm, and by then the magic of the story is lost on me and I can't remember all the parts to it or what had made it so special. I do keep a notebook to jot down ideas next to my bed, but I'm usually half asleep and so tired when my mind is writing that even that seems like too much work. But it makes me feel like a slacker writer. How do you do it all? Have a normal life and also fit in writing? I've certainly tried writing sometimes during the day or early evening, but its not my prime time for creativity and so it feels like I'm always forcing it. Do I need to train myself to be a writer at all hours of the day or do I need to give up some sanity and sleep and write at night like I used to?