I had an ultrasound but I don't think it was doppler. It showed occlusion at various arm positions. The bigger issue is whether you are symptomatic, regardless of test results. Obviously, doctors like tests to confirm their diagnoses, but often that is not the case with TOS -- especially neurogenic TOS.

Has your doctor offered any other explanation for your symptoms and pain? More importantly, has your doctor suggested any treatment that might address your symptoms?