I had CTS surgery on my right hand in the early 1990s.

The pain from CTS ran all the way up my arm. From the wrist up into the shoulder. So, I'm not surprised your upper arm hurts.

Good luck asking the doctor question.

I'm getting the test for carpal tunnel done again in April, my arms have been going numb when I sleep a lot. The neuro said he thought that was CTS instead of an MS thing, so I'm getting the test done on my next neuro visit.