Will I be forced to back pay child care expenses from when I was laid off?

I have a question about my child support order. I as laid off from my job last year and due to the transitioning I had to pull my daughter out of pre-school/day care and have my mom help me watch her for free for two months. Can I be forced to reimburse the father for child care costs which he pays a percentage of out of his child support because of this?