SD Card Freezes every device. I need to recover the files. SanDisk ExtremePLUS

This is the first time it has happened to me, and I'm freaking out. There is a whole videoshoot in there.

So it just happened. The camera froze. I removed the batteries, reinserted them and, since that didn't work, I changed SD Cards.

I didn't give it much thought yesterday, but I tried connecting it to my PC today and the whole of Windows froze. I really need to recover those files. I dont care about the card at all. The other cameras don't read it either. I've changed card readers as well and tried a laptop built-in reader.

I've tried changing the assigned letter on Windows, also reading it with RPhoto and nothing. 

What do you recommend me doing?