Is it possible to have Myasthenia Gravis with negative lab results? I have had an IEMG with 'extremely abnormal' findings, but feel lost when noone can explain to me what is happening, and more importantly, what can I get done about it. I am a 37-year-old mother of 3, I have had hyperthyroidism, was given i-131 (twice) that 'killed' my thyroid, now I am hypo, but stable for the past 5 years, although I still have the Graves' eye disease. In the past 8 months, I have had increasing muscle weakeness, pain, and tightness. I have seen 2 rhuematologists, and am about to see a neurologist. What can I expect at this point, if they are unable to find ANYTHING abnormal in my bloodwork?