There are ways to show him he is not treating you well without leaving, screaming, and walking away. If you just walk away you are going to have it tough than if you can both work through your differences and difficulties. Love is not just a feeling. It is a choice, it is a commitment. You choose to commit to each other and things can work out well in the end. Over 20 years ago I knew a couple who almost split up. They are now happily together. They finally had to have a meeting if the minds. They ended up seeing things from each others point of view. They insisted on and gave each other the respect they deserved. I trust you 2 can do the same.
Perhaps you could get a license for a day care and take care of other people's children and also be able to stay with your baby!
Also, try not to fight too much as it is bad for the baby!
Good Luck to you!