Grief is elusive

Every time I think I've figured out a way to sleep all night, I realize I've been tricked. Why is sleep so elusive? Why does something work for a short time? Then it stops working... What is going on in my brain? It's been 2 months. Initially, I slept well every night after so many nights of waking up for pills or pain management. I thought it would be easy. One month in, sleep interrupted. Now I try different ways to trick my mind into 8 hours sleep.... I know, I know, if that's the biggest problem I have them I'm doing pretty good.