I just discovered this forum and will start to be very active on it. I could write 6 pages about my root canal stories but will go to the point to answer your post. I am crap too and an 99% sure it is due to my root canals. I have 7... just imagine! What struck me in your post is your right arm. I had a root canal on tooth 30 and 24 hours later, out of nowhere, a constant burning pain in my right arm between the elbow and the shoulder started. It has been almost 5 years now, I saw all the possible doctors (who of course said I had nothing), spent a whole lot of money, went through several depressions. My arm sensation NEVER changed. The only time it gets worse is when I wipe something like a counter or windows, beat eggs, write or keep it above my head. Then I lose strength. But it never improves, just always here.
When it started, I started an intensive job and it developed into a root canal, could not open a jar anymore. When I stopped the job, it just went back to the same constant pain.
When it happened, I immediately linked it to my root canal as 16 years ago, I had 2 root canals and a sudden pain in my throat started. But I think I will start a new post with my story.
The point is that I am almost ready to have them all removed as my life is just miserable. If I do that it will basically ruin my budget but I just can't take it anymore. Would you mind describing your pain a bit more?