Freezing then burning sensation in Right Hand

About a month and a half ago I fell and landed on my right hand, injuring my thumb. For 4 weeks it was imobilized and I recently returned to work. Since the incident, I have had chronic pain and achiness, however it significantly improved, thus my return to my job. For the last week I have been experiencing frequent bouts of first a "cold" sensation immediately followed by a "burning" sensation from the tip of my thumb radiating to my index and middle fingers, and past my wrist. My fingers are then numb for a time and I am in a great deal of pain. Sometimes this happens once a day, sometimes 4 or 5 times a day. Any insight on what may be happening?  I did make an appt. to discuss this with my doctor but am very scared and nervous and am just looking for a little reassurance.

[Londres70]

Sounds like a nerve entrapment.  

What physician are you going to see for this?