C.R.
I am so sorry that you are in this situation. Being pregnant is challenging enough (especially when you have issues with depression) without the current situation. If he's not willing to sit down and talk with you face to face, I'm guessing that he won't try couples counseling. Since he seems so set on proving that there is something wrong with you, your parenting, or whatever - I think the best way to have a discussion would be with a trained, neutral person like a therapist who can help to focus the conversation and get to the real issues. If he isn't willing to do this, you have to move on for the sake of your own self-esteem and the well-being of your baby.
In my experience, ultimately who is right and who is wrong becomes unimportant. It's an argument that you could have forever. What is important is that you take care of yourself physically, emotionally, and financially. I think I remember reading that you moved to Albuquerque pretty recently. Do you have friends and/or supportive family there? I know it can take a while to build a support system in a new place. You are in a major city, you may be able to find a group for single parents where you could find support and encouragement through this difficult stage. I'm in Las Cruces so I'm not sure what community resources there are in Albuquerque. Continue to work with your psychiatrist - he/she may be able to point you toward some groups that could help you.
The financial stuff is the stressful, ugly, hard part. About 12 years ago, I had a boyfriend who I lived with that took off with one of my coworkers and left me in a horrible financial bind. Because we weren't married and most things were in my name because I had good credit before I met him, I was never able to get any money out of him - even after I took him to court. (He left the state and I did not have the resources to pursue the money he owed me.) Your situation is different because you are pregnant with his child and he is financially responsible for the child at the very least. Attorneys can be expensive, sometimes mediation is cheaper, but do SOMETHING legally to establish paternity and child support. You and the baby deserve that. I don't want to stress you out further because you have so much on your plate right now AND time is important because you want a financial agreement in place before you have your baby and (God forbid) before he can leave the state and makes things harder. A Consumer Credit Counseling service may be able to help you make a plan and manage your bills - and it's free. They may also be able to recommend low or no cost legal help.
Continue to see your doctors and therapists. If you are on antidepressants, make sure you are taking them (Wellbutrin is OK for pregnancy if no one told you that yet). Rally all of the emotional support that you can find. You will be OK, someday even better than OK. If he's not willing to talk, the only thing you can do is take care of yourself and that sweet little miracle that's due in a few months. I have issues with chronic depression too, so I really know how hard it is to do anything when you're depressed. If you can't manage to do these things for you - do it for your baby. Good luck and God bless. You will be in my thoughts and prayers.