Diagnosed with Thoracic Outlet Syndrome in 2018 and had my cervical rib removed in 2021. Don’t think you have it since I never found movement or lack thereof to increase or decrease the pain significantly. Since the rib removal, however, if I lay on that side I get pins and needles and an increase in pain that wakes me up at night.

Had to stop using my arm completely, prior to the surgery due to the excruciating pain. Not using it didn’t make the pain go away, it just helped me to deal with it better. Every time I would try to do something when the sharp pain would come, it would cause me to involuntarily suck in breath, followed by endless tears and prayers for mercy. Truly torturous by any measure. Think you’d be begging for surgery if you had it.