Help a single mom of three

I moved to South Carolina with my three kids to help myself stay clean so I could provide a better life for me and my kids. I came here with nothing but my kids and our clothes. I am a full time psychology student and have managed to get us our own place and a vehicle. However, I am having trouble getting our car registered. My temp tag ran out on the 15th and I just don't have the money to get it legal. Asking for help like this is hard for me and it's not something I would do if I could help it. Please help me get our car legal because after everything I have fought so hard to achieve (including getting my license back after not having one for over two years) it would really stink to get a ticket and lose my license all over again. I'm really trying to better our lives and this is a very important step. I just need a little help.