Can child support payments be reduced due to lower income and receiving Social Security

I pay child support for one child and have been receiving Social Security. I would like to reduce my support payments as I do not make nearly the amount of money I did when I was first ordered to pay support five years ago. Is it possible to get my Florida support payments reduced and what would the process be? I was told since I married a woman who came into our marriage with her own personal funds that her money would now be counted as mine if I try to reduce my payments. Her funds are in her separate accounts. The only thing we own together is our homesteaded home. We were not married at the time of the child birth. Thank you in advance for your advice.