Nikon d5100 Formatting?

I have a nikon d5100. Recently, it has not taken any memory cards. I have been using a sony disk for about 1.5 years, and when I bought a new one, and loaded it. I Keep getting an error screen reading "Memory card may be damaed do not use"
Now, every memory card being put in, from a 4gb up to a 32 gb, sony and pny brands, all get this error screen. I have hit the format button on the camera, and nothing is working.
Called Wolf Camera and they said they have not heard of this issue and could not help.

Any suggestions!
Need my camera, in working condition in 4 days for an event.

What is a "Sony disk"?

Your D5100 uses SDHC memory cards. You should have at least a couple of them.

The problem is that SD cards are not robust, but they are small and convenient.

If the camera is telling you that the card is damaged, then it probably is.