I have never had that happen (nor heard of it happening).
I would first double check with the camera User Manual and verify that you are inserting the card correctly.
I would also try a different memory card as it is possible that some physical damage has occurred to your present memory card.
You could also check with Nikon Service to see if they have encountered such a failure.
They may have encountered one and have a solution.
I need advise. I took my sd card out of the camera to view pictures. When I went to put it back in, it would not "click" down into the camera. Anyone have any advise? I know it was put in correctly but it will not stay down in.