you mentioned being financially dependent on him. which is tricky because he IS your husband, but also a complete flake. this doesn't usually work out well. relying on the UNreliable is not a sound fiscal plan. but sometimes that is where we end up.
and then like it or not, we need to formulate a plan to change our circumstances. it will probably behoove you to plan on not seeing much further $$ from the AH. which means you need a plan B. sure you can sue him for child support,etc, but if he is running his finances into the dirt, he won't HAVE anything to offer.
you mention your mom can "help". can you leave the apt and go live WITH her? is that an option?
what about your work skills? it's advisable to aim for self sufficiency. that may take time, but it's a worthy goal.
now is the time to take the reins. become empowered, not beholden to anyone.