For about six weeks I've been going to bed between 10 and 11 pm and waking up between 4 and 5am. There were a few nights when I was awake and at my desk by 3:45am. I'm not doing this on purpose. I just can't seem to sleep any longer than that. I've tried staying up til midnight or later but I just keep waking up before 5am. This has been driving me insane. I'm pretty sure it contributed to the weird stomach bug I had last week, too.