You are now working the high wire without a safety net.
CHKDSK, etc, can/will get you into all sorts of hassle (read: bye bye data).
First, push back far enough so you can not reach the keyboard.
Nobody is bleeding or dying on the side of the road, so you can take time to develop a plan.
If you have critical data on that disk, you have to take steps to make a copy you can restore, should your efforts go South.
I use Ghost Corporate, to make a forensic image (sector by sector).
This is your safety net.
Next, I use OnTrack Professional data recovery.
This is a pricey piece of software, and not for the one-off guy.
If you don't mind the considerable expense, you can contract with OnTrac for a data recovery.
If the drive is mechanically sound, they install an Active-X control on your machine and come over the Internet to work their magic.
Their not-for-sale tools are FAR more comprehensive than the (expensive) tool I bought from them, but they get the job done.