I’m disabled now, do I still have to pay child support plus they would get social security benefits?

No

Yes, you still have to pay. But, if you show that you legitimately receive disability income, there might be a limit on how much they can take from you. Whatever that amount is will be based on a few factors that are specific to YOU and YOUR situation. My first suggestion for you is to report your disability income IMMEDIATELY. It's best to take your reward letter to a child support office.