Hello!
Thank you for asking on HCM!
I read your question carefully and understand your concern.
Your symptoms don't seem to be related to any cardiac cause.
As you refer, the pain is exacerbated from the arm movements and the respiratory movements (causing
difficulty breathing), so it is probably a musculo-skeletal pain.
Based on your complicated clinical situation, both
fibromyalgia and RA can cause these symptomatology.
I would recommend consulting with your attending physician for a careful physical examination, a routine blood test and a chest x ray, to exclude other possible causes. A
cervical spine x ray may be necessary to rule out a possible cervical spine degenerations, which could cause
radicular pain in this region.
Meanwhile I advise using painkillers like ibuprofen, ketoprofen, etc and
physiotherapy.
Hope to have been of help!
Greetings! Dr. Iliri