Index finger cold pain in wrist?
I'd bet it's Carpal Tunnel Syndrome. Despite it's reputation, it's not just a yuppie disease, and if you let it go on for months or years with no treatment your hand muscles could atrophy. Since you can't go to the doctor now, get a wrist splint at the pharmacy and wear in on that hand, particularly while sleeping at night. Take Advil ((it cuts down on the internal swelling in the wrist that often causes this problem.