I would ask your attorney to ask the Judge to re-address the retroactive support, keeping in mind that your credit cards have been MAXED TO THE LIMIT just to pay for your gas, lights, food, water, fuel for car, etc. -- only essentials!
Perhaps the judge will take pity. The judge SHOULD award these to you, since he was ORDERED to pay these costs in the first place!

Talk with your attorney and see what she says. I hope she's not scared of the judge. God bless & take care. Hugs, Lee