Hi Shari -
It seems hard to get a diagnosis for this disease and then once you have own you wish you didn't! I thought the SFEMG was far less painful than the EMG. When I had my chest xray they said it was normal - then I had a CT Scan and it was normal - then I had a thymectomy and they found a huge thymus growing up into my neck pushing on my vocal chords. Apparently thymic tissue is difficult to see - the CT scans aren't always accurate. I hope you get some answers.
Gabe