I've had the same problem with sleeping and depression (not same cause as you though).
Here are some tips I've found helped me through my sleepless depression:
-Warm glass of milk before bed.
-Stay away from TV, computer, or other sources of light where you have to stare into about 1-2 hours before bedtime. Read a book or magazine or listen to radio or something.
-Exercise, but Do NOT work out in the evening. Try working out in morning or afternoon. Also for your depression, working out will help you feel better in general and actually helps you sleep as well.
-Finish eating at least 1 hour before bedtime.
Hope it helps.