If chkdsk has been running for multiple days, your drive is fucked.

Cancelling it could make it worse, but we're talking a gut stab and losing a finger vs just being gut stabbed.

Don't have that drive powered on more than absolutely necessary. If it's a HDD in a laptop, don't move it if you don't need to, and never while powered on.

For the best chance of getting as much as possible off it: Get access to another computer and make yourself a USB stick with some live-bootable Linux on it (so it runs all from the USB and RAM and the HDD is only in use when copying stuff off). Get another drive of at least the same size, and use a low level disk copying tool to copy the busted drive to your new one. Most of these tools will overwrite whatever is already on the destination disk. I think dd in Linux will work for this, but it's been over a decade since I last had to do this, so best to do some research on your own.

I think your d drive is fucked.

F

If you can afford the time and it appears to be progressing, let it ride.

Either it is recovering further files which you can quickly remove and save elsewhere or it is busy scuffing the disk into an unrecognizable state. If you have all you need then it doesn't matter if you let it run. I wouldn't trust it after this.