The Grim Reaper?

I've been a nurse for 17 years, as an ED/Trauma and LTC/SNF nurse. I've seen thousands of death in my lifetime. Death is different for everybody but one thing is constant and the same... a black shadow. I'm not claiming to have a 3rd eye or something. I've seen this dark and faceless shadow multiple times throughout the years. Whenever i see this shadow, i know for sure that the patient is dying soon; i also feel we know each other for a long time because it seems like this shadow is one and the same throughout the years. I don't feel an ominous feeling, there's no fear, just sadness. Am i reaching? Is this the grim reaper? Anybody with the same experience?