I agree with everything keepinon said and adding one more -- (peri)menopause might be adding to your depression. I wonder sometimes if us women forget to take that into consideration, and are too hard on ourselves. I'm 46 and experienced a couple of mood swings about a month ago. It reminded me of being a teenager and I went from calm one second to depressed/angry in another.
Anyway, I see a therapist on a regular basis and it really helps. He specializes in addiction and is also a licensed marriage and family therapist. Got all my bases covered