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My suggestion is to get a lawyer through your bar association's volunteer lawyer program. However, if it has been less than two weeks [usually it's between 14 - 30 days], it is likely you can file a motion/request to reconsider. I would state in the motion that your husband has not moved back in and that you and your children are without support. I would state that it is in the best interest of the children that support begin immediately based upon yor state's guidelines. It is presumed that if he is living with you that he is providing support. If you submit a statement that is notarized that he promised to move back in, but never did and did not provide support, then you will have rebutted this presumption. Good Luck.