I need some Camera Help!?

I was using my camera all weekend just fine. Then all of a sudden at the end of the day, when I needed it most...it stopped working. I go to turn the camera on and it says Memory Card is unusable. (insert new memory card) this memory card isn't even 6 months old. It's an 8GB memory card and I've only taken maybe...200 pictures? My camera is a Kodak EasyShare CD80. Can ANYONE help?!? Thank you!