Some insurance companies will cover a car seat. I live in Massachusetts, but I heard that companies in other states do the same sometimes too. It's worth it to find out bc they may pay for a brand new one!
Try your states wic program. Call hospitals see if they are involved in a healthy start program. Even ask your dc office
Is there a page you would recommend on Facebook?
Check the mom swaps on facebook. Alot of mom's are very generous.
I don't know how it is in SC but here in NC you can go to the firefighters station department they will help people out just like you.They give car seats,clothes and they might give a crib too. You could go to your local firefighters station in SC and ask.