H.R.
One thing I had to learn was that it is ok to ask for help. You obviously have a doctor, and I would talk to her/him. Mild exercise can help get you feeling better ( I know that is hard after birth, but it does help) but getting on a good antidepressant helped me relearn what feeling good felt like. You said you had a complicated situation, so your depression may be more than postpartum hormones or may be compounded by hormones. Sometimes it just helps to talk to a good friend, and a good friend wont care how many times you cry over the same issues. I really hope things get better for you!