Your sxs sure sound a lot like mine. I had left rib resection in 2005 and am worse for it. Like you, I had normal nerve conduction studies, relatively normal cervical MRIs, normal xrays. I did have the 3D MRI/MRA study with Dr. Collins, which showed TOS.

I tried yoga at the beginning of this journey. I liked it for the mental aspect, but I couldn't take all the arm forward and above positions. So I just do abdominal breathing -- often on my foam roller.

Good luck.