Approximately one year ago, I volunteered to work on one of two night shifts at my workplace. This shift was between 4:00 PM and 12:00 AM so it was OK - I'm usually up those hours anyways. But six months in, my supervisor ordered me to temporarily fill a critical position working two days a week between 12:00 AM and 8:00 AM - not OK. So, since January, I've been toiling away, doing two graveyard shifts a week being told that it would just be another two months before my replacement was hir...