R.J.
First off... you can call most of your creditors and get your bills put on hold. All the public utilities will, and most credit cards.
2) If your own your house speak to a lawyer NOW. There are probono lawyers / legal advice lines, and programs put in place to help people avoid foreclosure, if they act soon enough.
3) Ditto the above for spousal/child support if you're not already receiving it. Your husband is legally (and morally!) obligated (married or otw) to be assisting in the care of his children
4) Unemployment. The amount you would receive varies greatly depending on how long you were at at your job, and how much you were paid (and can be denied if you were fired, but that can be appealed). Unemployment lasts for 6 months, and is always better than a poke in the eye with a sharp stick.
5) State aid. Yup it's hard to qualify, and it's a pain in the neck. You've also been paying into it every day of your working life, as has your family, as has your children's father. When you return to work you will continue to pay into it. It doesn't help much, but any kind of help is better than none. it's amazing to me though, how many hard working families would rather let their children go hungry and without medical care, than to swallow their pride, much less change their perspective. Of course, a lot of that "pride" has been created by the media and by our own perceptions of "who's" receiving aid. Nearly every military enlisted family I know of is on WIC. That's usually shocking to most people... because it doesn't fit their prejudices. It's a big PIA, but every little bit of blood you can squeeze from a rock is worth it.
6) Financial Aid for School. Go to FAFSA. http://www.fafsa.ed.gov/ One usually has to apply for financial aid 6-12 months in advance in order to be awarded, and one ALWAYS needs a FAFSA, both for school & govt. aid. Private aid is more flexible, but any that require or have a need based scale also require a fafsa.
When my son was born I realized, rather chagrined, that I couldn't afford to work. The daycare costs exceeded my income. I was already planning on going back to school, and that sealed the deal. I've been in school part time for nearly 6 years now. Tremendous fun... but there are also limitations. For ME, I found that I couldn't be a good mum and a good student at the same time... so I switched things up... and only studied/worked after my son was in bed. In order to maintain this schedule, I found I could only take 2 classes at a time. Also, my direction has changed somewhat since going back to school. My current educational goals will have me being "done" (although I'll be working long before that) about the time Ds7 is in highschool. People all have different paths to walk. I won't be the youngest/best/most accoladed blah blah blah... but I enjoy what I do, and my family comes first. DH though, went the opposite route, and pretty much abandoned us for his studies/prestige. Academia is a world unto itself. Be careful not to get TOO caught up in that world.