You just described myself. > At some point it becomes so bad that my waking hours are at night and vice versa This. One week I'm sleeping at night, some weeks

You just described myself. > At some point it becomes so bad that my waking hours are at night and vice versa This. One week I'm sleeping at night, some weeks later I've shifted to sleeping during the day. Then back to nights in a few weeks. Granted, this only happens when on my own -e.g.: working home and alone- otherwise I have to "adapt" by staying up all day, just like you. Not funny.