Serious i'm filing for spousal support,...........?:
Yes, fight for your rights, and don't give him any sex (charge him, just kidding, had to say that in the moment), the most important thing of course is the welfare of the children, and remember, documentation, documentation, I hope you have paperwork on everything that has happend in your life, and witnesses, he has to pay child support no matter what, he is their father and has to support them (like it or not/wage garnishment).  And don't question yourself if you need financial help, you do and you deserve it.  Good Luck and I hope things work out for you and your children.