I do this all the time. Stay up waaaaaaaaaaaaaaaaaaaaaay too late when I’m already super tired and know I want to / need to be asleep. It’s not as if I’m doing something that will save the world and eliminate poverty and feed the hungry. I’m usually just puttering in my room, reading useless things on-line, or just being awake. Why am I afraid of sleep? I don’t believe there are monsters under my bed.