First of all I'm sorry to read you've lost your Mom. Losing my Dad back in 2008 was the start of my collapse into the darkness of depression. Back then sleep was my main escape from my feelings. Recently, I've been dealing with insomnia and wake up every morning tired and irritable. I've been avoiding sleeping medications because I know once I start, I'll become dependent. I'm using Melatonin which seems to help me get to sleep initially, but I still wake up throughout the night and am unable to return to sleep.
Hope you're feeling better soon!