You may be having problems with your cervical spine. Have the dr do an xray. I had the same symptoms but it involved my pinkie and fourth fingers. I went a few times to physical therapy and it resolved. Good luck
I 'second' what Barbinpain just said.
It might be something like this:
http://www.allaboutbackpain.com/html/spine_cervical/spine_cervical_radiculopathy.html
Don't lose sleep worrying or anything like that -- just make a doc appointment.
When this happened to me, I thought it was the end of the world.... then I found out that pretty much everyone in the world has something like this LOL
Get seen right away though, sometimes the sooner you get it taken care of, the easier it is to fix.
I'll keep my fingers crossed for you that it will be just an ice pack on your neck for a couple days.