You should learn a valuable lesson to back up all your card or drive data well in the future.
But, right mow, do not format this SD card and also stop using this card in case of data loss.
And then, insert this camera to your computer and start to restore your data. In your case, you can take chances with some data recovery tool like:
It has four data recovery options for users like you to restore different files back successfully.
Note: You’d better format this SD card after data recovery to fix its RAW file system problem.