For as long as I can remember, I can fall asleep only when my body and, more importantly, my mind, become exhausted. This obviously leads to an irregular sleeping cycle that's been a pain in the neck throughout my life. I'd like to hear from people who experience or had experienced a similar issue, and how they dealt with it. I never went to a doctor for a diagnosis, but if anyone (preferably a professional, but I'll take anything) could tell me what I have I'd really appreciate it.