Is it an issue that you have no where else to go?
I don't think staying with him while attending school and trying to care for a baby is a very good idea.

This baby is now in the midst of a domestic situation that no baby should be brought in to.

I tell you this because I essentially did the same thing to my children...kept making deals with myself..that I was going to stay until such and such a thing happened and then I was going to move out.

All the aruging...and just the general feeling of "anxiety" and "tension" in relationship is noticed by the baby even if the baby is unable to speak...Its never good for a baby to be involved in a toxic relationship.

In hindsight I WISH I knew the damage I was causing to my children..I always thought that because it was just he and I arguing and we never yelled at the children and we always showed them love, affection and attention that they would be ok...

This is not the case...a hostile environment leads to unstable children who later in life also can't chose healthy relationships because they were taught more on how to survive in unhealthy relationships.

To be a the best Mom you can be...its necessary at ALL expense to get yourself and your child out of this environment...and then let the problems be worked out from a distance if at all possible.

If you stay..until you are done with school...you are doing a disservice to your child.