I imported photos directly into LR (as I've done in the past), I ejected the sd card, and then I reformatted it. Now LR is saying that the original photo files cannot be found. It shows me the thumbnail at the bottom. This is no different than I've done before. How can I recover the data? Am I screwed?
Right click on one of the thumbnails and select "Show in Finder" for the Mac or whatever the command is for Windows. Does it show the file is supposed to be on the SD card?
Before you use this card, get a program to recover the files on the card. If you have used the card in the camera again you may be out of luck. Don't EVER reformat a card until you have assured yourself that the files have been correctly transferred to the correct place and are readable and then have at least one backup of the files.