Does your laptop happen to be a Mac? But no matter. You can still use your laptop to recover your photos with recovery software. Here's several freeware
for PC's, but it also includes a link to one freeware for Macs just in case my guess was right. Seem to see this particular problem occurring frequently (corrupted card after plugging into computer), but primarily occurring with Macs, and also gaming systems such as Wii.
Now to get the card working again, after recovering your photos, you'll need to format the card in your camera using the cameras format feature. If the camera does not recognize the card, you'll need to format it first in a PC to FAT32, then reformat again in your camera.