I have an under active thyroid was diagnosed 12 years ago. I been feeling more sluggish, waking in the morning as if I’ve not slept. Aching- just no energy. By the evening feels like I’ve done a 25 mile run... I saw my doctor last Thursday- she noticed my eyelids were drooping and straight away said she thinks I have myasthenia gravis, had my blood test Friday. Don’t know how long I have to wait for the results? I had never heard of it? Thought my thyroid was out of sinc. Was expecting to have my Levo meds changed. I hope you’re ok and coping well.