P.M.
Owww, K., tough situation. If even your lawyer doesn't see a way clear, then it sounds like something you may need to work through directly with your ex, or learn to tolerate a while longer. If I were in your shoes, I would take a look at the wonderful process called Non-Violent Communication, which can give you some real tools to make the most of whatever interpersonal situations you may find yourself in.
There's also a self-help process called The Work that you may find helpful: http://thework.com/thework.php. My husband and I both use this work as a way to decrease stresses and understand other people and ourselves better.
September must feel years away for you right now. I think many of us have been in distressing jobs, relationships, and even difficult pregnancies or with challenging infants, in which a couple of months seemed impossible to survive. But the time does pass, one day at a time, and we often come out stronger on the other end. And whatever you do in that time to preserve whatever love you feel for this man will be better in the long run for the child you have made together.
I wish you the best.