Hmm, usually if right sided sx and right side has something in c spine touching the right side C6 nerve...that seems to show a possible clear cause..

Did they offer PT or any treatment for the c6 issue?

Do you have left side TOS type sx also?
It is possible to have both a c spine issues and TOS..

If you list out your symptoms and if R/L sided maybe we can help more.
And do you have any cause that you know of, or possible factors that would point to TOS?