Carple Tunnel Syndrome or tendonitis ?

Hi back in 1999, I went to the doctor,because my left shoulder,arm and hand were causin me severe pain and making it hard for me to sleep at night. I was sent to have a nerve conduction test,were I was diagnosed with Carpol Tunnel Syndrome. I recieved a cortisone shot in my elbow for tendonitis, and in my wrist to try and releve the symptoms. I started wearing a splint at night,to allow me to sleep. It really never cleared up just became managable. I've had the numbness and tingling since then. Well in the last yr,my whole left arm will cramp up,from the shoulder down to my hand. I finally got sick of it and went back to the doctor she set me up with the neurologist to have the nerve test done again. Too my surprise the doctor told me I don't have carpol Tunnel or a pinched nerve in my arm. He only tested just above the elbow. He never told me what could be causing it, just prescribed a different medicine than the 800 Mg Ibrofen,because I only took it once a day,instead of three,witch my script said to take it if needed,it upset my stomach so I took other pain relevers. Now What I'm confused am I was suppose to live with this the rest of my life? Why did one test say I had it and his said I didn't? I'm ready to just cut my arm off and be done with it. I'm very upset because he didn't listen to me,and cut me off when I tried to talk. I want to know what is wrong because I know it is not normal. Any help would be appreciated