First of all, I'm sorry to hear of what you've been going through. I have BTDT and it's so hard, especially when you're caring for little children, too.
Have you looked into any nutritional approaches? The book The Mood Cure by Julia Ross was immensely helpful to me. After 15+ years of taking meds for diagnoses of depression, anxiety, insomnia and adult ADD, I am now on no meds. It turned out that I had some severe food intolerances and allergies, and by drastically changing my diet I eliminated all those symptoms. I take no meds and feel better than I have felt in decades.
I wanted to speak up because I wish that someone had told me this kind of information when my children were babies and I was struggling so desperately just to get through each day (and night). I just had no idea back then what a difference diet and nutrition can make.