I really think that the best thing that you could do right now is to be a good mother. That way there is nothing that this other person could do to you. And that should be easy enough.
I am sorry that you have no resources for your depression. Have you checked with your local mental health organization to see if there are any programs that you would fall under to receive treatment on a sliding scale. Often there are some.
How long have you been on your antidepressant? It often takes four to six weeks before they reach their full potential. I think that if you have been on it long enough and it isn't working, you should talk to your doctor about it. Maybe you need a med adjustment or a different kind of med.
Here are a couple of free internet sites that might help you.
I hope that they are of some help to you. Keep posting as we are all here for you.
Moderator-Depression and fibromyalgia
fibromyalgia, Chronic fatigue, depression,allergies