Only mildly depressed? You've been through a lot. Repair time.
When I'm going through my roughest times my sleep time really isn't sleep at all. I fall asleep early then wake up in the middle of the night after a dark, numb, dreamless state. It feels like morning but only a few hours have gone by. Other times I never reach deep sleep but end up cycling through problems in a barely a light haze of sleep.
-- I though I'd never say it but I miss tripping over W's girly shoes and clothes scattered all over the floor. Nothing like stepping on an upside down high heel at 6am for a quick jolt awake. I ended up with one or two of her casual shirts in my laundry and I don't want to give them back. Does this mean I miss her?
"My actions are my only true belongings. I cannot escape the consequences of my actions. My actions are the ground upon which I stand." Thich Nhat Hanh