If you are successful in getting your child support reduced, the reduction will be retroactive to the date that you filed the motion. If you know your children's wife's income, you should be able to calculate the child support based on your new income.
If you don't pay your child support, the mother may file an order to show cause why you should not be held in contempt of court for failure to pay your child support as ordered. If you are found guilty, it is possible that you could be sentenced to up to 12 months in jail. The court will take your efforts to pay into account when the judge makes his or her decision.
If you don't pay your mortgage, it is possible that the mortgage company can foreclose on your home.
I'm sorry, but you are in a tough situation and only you can make the decision about which payments to make. Hopefully, you will be able to get another job quickly.
Kristina Beavers, Attorney at Law is located in Yorktown, VA and can be contacted at 757-234-4650. The website at http:\\www.BeaversLaw.com may be able to provide additional information about your situation. I cannot give legal advice because there is no attorney-client relationship at this time. All I can provide is general legal information.