When you said depression....it made me think that maybe a depression med might help. I was not sleeping well at all, and was up all night long. Since getting on the Cymbalta for lower back pain, I have been sleeping much deeper and longer at night. It's someting to think about....and I can't remember if you have a back problem or not.
Sleepless nights are the worst, and makes for a horrible next day. I feel for you, as I have suffered with the same problem for a very long time. Stress can also be a big factor, and it never let's our brain shut down for the evening. Just a few things to think about....hopefully you will find a solution soon.
Take care,
SE