I used to have really bad pains in my hands, from my work also( repetitive movements). From the symptoms I had I figured out it was tendonitis. Does the pain feel like it's where a tendon could be? Mine was mostly confined to my thumb and palm. It hurt like holy hell! I would drop things, and cry out once in a while it hurt so bad. I got a wrist brace meant for tendonitis, and it worked wonders.It put pressure on just the right spot. Then I quit my job, and now its gone completely.
My sister had carpel tunnel and had to have surgery, but that usually takes years to develop.